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1/23 product preview this is preliminary information on a new product now in development. details are subject to change without notice. TDA7522 digital servo & decoder n built in 8bit microcontroller (standard st7) with: C 24 kbyte rom available for st7 & servo-audio dsp C 1024byte ram, including 128byte stack C 4kbyte ram for cd-text memory (for 1block) C built in r-w subcode buffer (max. 144byte 8packs) for cd-text C 24 bit general i/o port (poarta[7-0], portb[7-0], portc[7-0]) C one external interrupt (16 irq encoder inside) C 16bit free running counter timer C 8bit 1ch general purpose a/d Ci 2 c bus i/f C watch dog C kenwood i/f n stand-by mode (stop all clocks and shut down power of peripheral (pon pin)) n built in servo & audio digital signal processor (sac-dsp) inclusive of: C 1024x19bit program ram C 512x16bit coefficient ram C 1024x20bit data ram C 128x6bit decimation ram C mac: 16 bit (coefficients) x 20 bit (data) multiplier with 38 bit adder C instruction execution rate as high as 56mips n built in programmable clock generator pll n peripherals for cd player application C data acquisition, erasure correction, clv&cav controller C subcode decoder (cd-text, cd-graphic i/f) C shock proof memory controller, disturbance detector C decimation filter n actuators driving mode selectable between pwm or pdm mode n 256fs / 384fs (16.9344mhz) clock input. may 1998 tqfp80 (14 x 14 x 1.40mm body)
TDA7522 2/23 1.0 description TDA7522 is a single chip processor consisting of decoder, servo and 1bit d/a for 4times cd-rom / cd- audio. main concept of this ic is that it is based on embedded system micro controller which allows cus- tomer to develop system software very easily: just based on provided commands. further the microcon- troller is fully customer dedicated in terms of both software and general purpose port. by combination of st analog front-end ic ( tda7521 ), all cd functions including shock proof memory controller and cd-text function can be realized. the TDA7522 portfolio is constituted by three different versions: C development: which gives the possibility to have at disposal the complete sw development environ- ment, by means of a dedicated package C in field development: standard package but with selection of program memory: on chip ram, on chip rom. the program ram is fully patchable through the standard iic interface, giving the possibility of sw changing while chip is working in the real environment. C production: standard package, but with software permanently stored in the on chip rom. 2.0 technology all version are produced using the hcmos6 0.35um technology which works @3.3vdc; to avoid interface problem with existing logics, all digital inputs are 5v tolerant. when interfacing logic on TDA7522 outputs, user should take care of output levels that are at cmos level @3.3v. depending on output type the i ol and i oh value are guaranteed at 4ma or 8ma; the TDA7522 output driving specification will be included in a next issue of this data sheet. 3.0 additional features n 16mbit dram i/f allows maximum 9 seconds shock proof n built-in 1bit delta sigma modulation for dac n subcode p,q and r-w decoding n error correction is capable of dual c1 and quadruple c2 erasure corrections n jitter absorbing capability: +/- 6 frames n automatic fine gain/balance/offset adjustment for tracking and focus servos n built-in digital silence detection n built-in efm demodulation/sync rear and forward protection n soft audio mute n built-in digital pll with large capture range from 0.5 to 4 times speed n digital servo control for all servo loops n capable of 2x and 4x speeds for shock proof and cd-rom applications n capable of wide temperature range (-40c to +85c) stable operation n fast access times for cd-rom applications due to wide capture range and cav mode run at max 4 times overspeed n clv or cav (lock-to-disk mode) spindle servo operations n digital output spdif (dit cp340) n sony lsi output interface (for audio & cd-rom) n pulsate sled mode support n built in 8times audio over sampling filter.
3/23 TDA7522 figure 1. pin connection pin_kdmphys 21 pin_pon 22 pin_avdd_1 23 pin_xti 24 pin_xto pin_avss_1 26 pin_kadc_vrh 27 pin_kadc_vrl 28 pin_kadc_in 29 pin_nreset 30 TDA7522 80-pin pin_testen 31 pin_core_vdd_2 32 pin_core_vss_2 33 pin_sck 34 pin_sda 35 pin_scanen 36 pin_kasel 37 pin_ktest 38 pin_ksearch 39 pin_mstop 40 pin_drd3 80 pin_drd2 79 pin_drd1 78 pin_drd0 77 pin_dra0 76 pin_dra1 75 pin_dra2 74 pin_dra3 73 pin_dra4 72 pin_core_vss_4 71 pin_core_vdd_4 70 pin_dra5 69 pin_dra6 68 pin_dra7 67 pin_dra8 66 pin_dra9 65 pin_dra10 64 pin_dra11 63 pin_ras 62 pin_cas 61 pin_muter 20 pin_mutel 19 pin_c2p0 18 pin_lrck 17 pin_bsl_sak48 16 pin_bsr_sdk48 15 pin_clkout 14 pin_dgtsync 13 pin_dgtlin7 12 pin_core_vss_1 11 pin_core_vdd_1 10 pin_dgtlin_6 9 pin_dgtlin5 8 pin_dgtlin4 7 pin_dgtlin3 6 pin_dgtlin2 5 pin_dgtlin1_uf 4 pin_dgtlin0_of 3 pin_serck 2 pin_serda 1 pin_spdl 41 pin_tfsr 42 pin_ffsr 43 pin_sfsr 44 pin_sledl 45 pin_k_ver_hor 46 pin_wfck 47 pin_exck 48 pin_sbso 49 pin_core_vdd_3 50 pin_core_vss_3 51 pin_scor 52 pin_dout 53 pin_cs 54 pin_srq 55 pin_datas 56 pin_datam 57 pin_clk 58 pin_drs 59 pin_dwr 60 25 TDA7522 g eneral overview is reported below. remark: considering the selection done by customer, the dram i/f could be sligthy modfied. details will be given in a later issue of data sheet.
TDA7522 4/23 table 1. pin description pin number name function description 01 serda i/o data line for serial i/f 02 serck o clock line for serial i/f 03 dgtlin0_of i hf bit 0 and servo overflow 04 dgtlin1_uf i hf bit 1 and servo underflow 05 dgtlin2 i hf bit 2 and servo bit 0 06 dgtlin3 i hf bit 3 and servo bit 1 07 dgtlin4 i hf bit 4 and servo bit 2 08 dgtlin5 i hf bit 5 and servo bit 3 09 dgtlin6 i hf bit 6 and servo bit 4 10 core_vdd_1 vdd digital power supply 11 core_vss_1 gnd digital ground 12 dgtlin7 i hf bit 7 and servo bit 5 13 dgtsync i sync strobe for multiplexer 14 clkout o system clock output to tda7521 15 bsr_sdk48 o lsi i/f clock output or dac bit stream right channel output 16 bsl_sak48 o lsi i/f data output or dac bit stream left channel output 17 lrck o lsi i/f l/r signal 18 c2po o validity flag output for cd-rom decoder 19 mutel o mute left signal (active high) 20 muter o mute right signal (active high) 21 kdmphys i/o de-emphasis indication or st7 gpio pa2 22 pon i/o system shutdown pin for power saving mode or st7 gpio pc7 23 avdd_1 vdd analog power supply 24 xti i crystal input 25 avss_1 gnd analog ground 26 xto o crystal output 27 kadc_vrh i adc top reference voltage input 28 kadc_vrl i adc bottom reference voltage input 29 kadc_in i adc input 30 core_vdd_2 vdd digital power supply 31 core_vss_2 gnd digital ground 32 nreset i hardware reset
5/23 TDA7522 33 testen i test enable signal (active low) 34 sck i iic i/f clock signal 35 sda i/o iic i/f data 36 scanen i scan enable (active high) or select dram outputs as test outputs when testen is inactive 37 kasel i/o dac polarity selection pin or st7 gpio pa0 38 ktest i/o user test mode selection or st7 gpio pa1 39 ksearch i/o gain change during search or st7 gpio pa3 40 mstop i/o interrupt request/stand-by pin or st7 gpio pc5 41 sledl i/o sled limit switch or st7 gpio pc6 42 k_ver_hor i/o indication of vertical or horizontal operation or st7 gpio pa4 43 wfck o write frame clock for subcode p-w output 44 exck i sbso readout clock input 45 sbso o subcode p-w serial output 46 scor o subcode sync output 47 dout o spdif digital audio output 48 cs i/o st7 gpio pc4 49 srq i/o st7 gpio pc3 50 core_vdd_3 vdd digital power supply 51 core_vss_3 gnd digital ground 52 datas i/o st7 gpio pc2 53 datam i/o st7 gpio pc1 54 clk i/o st7 gpio pc0 55 drs i/o shock proof memory read control 56 dwr i/o shock proof memory write control 57 cas i/o shock proof memory column address select 58 ras i/o shock proof memory row address select 59 dra11 i/o dram address 11 60 dra10 i/o dram address 10 61 dra9 i/o dram address 9 or mirror signal output 62 dra8 i/o dram address 8 or tzc (tracking zero cross) signal output 63 dra7 i/o dram address 7 or fok (focus ok) signal output 64 dra6 i/o dram address 6 or st7 gpio pb7 or pllinf signal output pin number name function description
TDA7522 6/23 note: 1. depending from new dram selection pin nr.59 could be not used in production version. 65 dra5 i/o dram address 5 or st7 gpio pb6 or ofs (fifo overflow) signal output 66 dra4 i/o dram address 4 or st7 gpio pb5 or wfck (write frame clock) signal output 67 dra3 i/o dram address 3 or st7 gpio pb4 or rfck (read frame clock) signal output 68 dra2 i/o dram address 2 or st7 gpio pb3 69 dra1 i/o dram address 1 or st7 gpio pb2 70 core_vdd_4 vdd digital power supply 71 core_gnd_4 gnd digital ground 72 dra0 i/o dram address 0 or st7 gpio pb1 73 drd0 i/o dram data 0 or st7 gpio pa5 74 drd1 i/o dram data 1 or st7 gpio pa6 75 drd2 i/o dram data 2 or st7 gpio pa7 76 drd3 i/o dram data 3 or st7 gpio pb0 77 spdl o pwm/pdm spindle motor control signal output 78 tfsr o pwm/pdm tracking actuator control signal output 79 ffsr o pwm/pdm focusing actuator control signal output 80 sfsr o pwm/pdm sled motor control signal output pin number name function description
7/23 TDA7522 figure 2. block diagram 4m / 16mbit dram digital equalization disturbance (mirror) detector digital pll & sync protection & efm demodulator 16kbit ram 8x audio ovs audio processing track loop filter focus loop filter sled loop filter te fe down sampling filter ac e f dsp delta sigma modulation pdm / pwm shock proof memory controller subcode decoder clv/cav controller cross interleaving reed-solomon st7 24kb rom 1kbyte ram i2c i/f slicer laser control hf adc servo adc amp pll 1bit dac + filter hf ac bd e f clock a+c b+d e f audio out 4ch driver ic ex. tda7473 focus actuator track actuator sled motor spindle motor i2c spdif digital hf tda7521(44pins) TDA7522(80pins) out bus cd text extractor cd text graphical interface lsi i/f lsi digital out tda7521 i/f control analog pll adjustment bd st7 clock peripherals clock external quartz adc adc in dsp clcok gpio mpu i/f
TDA7522 8/23 table 2. main dc characteristics (i) table 3. main dc characteristics (ii) 4.0 standard version memory map the memory spase, as seen by st7 is defined in table 4; please take note that there are registers which are used for less than 8 bit or, on the other side, when read only certan bit contain useful information. re- ferr to appendix a to have a complete list of register structure. table 4. TDA7522 memory map current input condition min typ max unit a+c diode input 1 16 a b+d diode input 1 16 a e diode input 1 16 a f diode input 1 16 a voltage input condition min typ max unit a+c diode input 45 700 mvpp b+d diode input 45 700 mvpp e diode input 45 700 mvpp f diode input 45 700 mvpp address block register name reset status remarks 0000h 0001h 0002h 0003h por t a data register data direction register option register pull up register 00h 00h 00h 00h r/w register r/w register r/w register r/w register 0004h 0005h 0006h 0007h por t b data register data direction register option register pull up register 00h 00h 00h 00h r/w register r/w register r/w register r/w register 0008h ........ 000bh reserved 000ch st7 miscellaneous register 00h see specifications 000dh not available 000eh 000fh 0010h reserved for st7 test
9/23 TDA7522 0011h 0012h 0013h 0014h 0015h 0016h 0017h 0018h 0019h 001ah 001bh 001ch 001dh 001eh 001fh timer control register 2 control register 1 status register input capture 1 high register input capture 1 low register output compare 1 high register output compare 1 low register counter high register counter low register alternate counter high register alternate counter low register input capture 2 high register input capture 2 low register output compare 2high register output compare 2low register 00h 00h 00h 00h 00h 00h 00h ffh fch 00h 00h 00h 00h 00h 00h r/w register r/w register read only register read only register read only register r/w register r/w register read only register read only register read only register read only register read only register read only register r/w register r/w register 0020h 0021h 0022h 0023h por t c data register data direction register option register pull up register 00h 00h 00h 00h r/w register r/w register r/w register r/w register 0024h wd watch dog configuration register 7fh r/w register 0025h not available 0026h 0027h 0028h 0029h 002ah 002bh 002ch i 2 c cr: control register sr1: status register 1 sr2: status register 2 not used (ccr: clock control register) oar1: own address register 1 tx_data: transmission data rx_data: received data 00h 00h 00h 00h 00h 00h 00h r/w register read only register read only register r/w register r/w register r/w register r/w register 002dh 002eh 002fh 0030h 0031h 0032h 0033h equalizer equ_hpf: controll & hp filter coefficient equ_fir0: fir filter coefficient equ_fir1: fir filter coefficient equ_fir2: fir filter coefficient equ_fir3: fir filter coefficient equ_fir4: fir filter coefficient equ_fir5: gain register 00h 00h 00h 00h 00h 00h 00h r/w register r/w register r/w register r/w register r/w register r/w register r/w register 0034h 0035h 0036h 0037h subcode extraction qsr: q subcode status register qsd: q subcode data register cdtsr: cd text status register cdtdr: cd text data register 00h 00h 00h 00h r/w register r/w register r/w register r/w register 0038h 0039h 003ah not available not available not available address block register name reset status remarks
TDA7522 10/23 003bh 003ch 003dh 003eh 003fh 0040h 0041h 0042h shock proof wp1: preset of write pointer lower wp2: preset of write pointer upper csr: control/status register wa1: latest stored valid audio frame lower wa2: latest stored valid audio frame upper rl1: ram level lower rl2: ram level upper drr: dummy read to reset w/r counter 00h 00h 00h 00h 00h 00h 00h 00h r/w register r/w register r/w register read only register read only register read only register read only register read only register 0043h 0044h 0045h 0046h 0047h 0048h 0049h 004ah 004bh 004ch 004dh 004eh 004fh (hsy) bit detection and clock recovery phigain: phase gain frqcfg: frequency loop configuration frqgain: frequency loop gain frq_l: present loop output freq lower frq_u: present loop output freq upper frqi_l: initial loop output freq lower frqi_u: initial loop output freq upper bd_inten: interrupt enable bd_intsrc: interrupt source register phicfg: configuration for phase loop pllgain: lp filter coefficients for adpll pll_setup: overall control/configuration pll_status: pll mode status flag 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h r/w register r/w register r/w register r register r register r/w register r/w register r/w register r/w register r/w register r/w register r/w register r register 0050h 0051h 0052h 0053h 0054h 0055h 0056h 0057h 0058h 0059h 005ah 005bh 005ch event detection setup: overall control/configuration status: status flag ramp: peak detector decoding rate dropthr: dropout threshold droptim: dropout timeout focthr: focus thres. quality mirrpars: parameters for mirror signal mirrthr: thr for mirror env. for trk search mirrhys: hysteresis for mirrthr trk_cntl: tracking counter lower trk_cntu:tracking counter upper ed_inten: interrupt enable ed_intsrc: interrupt source register 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h r/w register r register r/w register r/w register r/w register r/w register r/w register r/w register r/w register r/w register r/w register r/w register r/w register 005dh 005eh 005fh 0060h servo sv_servo_cr: servo control register sv_twc_cr: tracking window comparator cr sv_twc_csr: twc control/status register fs_cr: focus search control register 00h 00h 00h 00h r/w register r/w register r/w register r/w register 0061h 0062h not available 0063h 0064h 0065h 0066h 0067h spdif interface crsr: status register cslo: left channel, lsbs csl1: left channedl, msbs csr0: right channel, lsbs csr1: right channel, msbs 00h 00h 00h 00h 00h r/w register r/w register r/w register r/w register r/w register address block register name reset status remarks
11/23 TDA7522 0068h 0069h 006ah 006bh pwm /pdm sled_cr: sled control register sled_dr: data to control the sled by st7 spdl_dr: data to control spindle motor pwm_cr: pwm output control register, 00h 00h 00h 00h r/w register r/w register r/w register r/w register 006ch not available 006dh 006eh pll pll_cr1: control register 1 clkcntl: clock control register 40h 00h r/w register r/w register 006fh 0070h 0071h clv/cav clv_cr1: control register 1 clv_cr2: control register 2 clv_cr3: control register 3 05h 00h 40h r/w register r/w register r/w register 0072h 0073h decimation dec_sr: decimation status register dec_cr: decimation control register 00h 00h r register r/w register 0074h not available 0075h 0076h kif interface kenwood i/f: register 1 kenwood i/f: register 2 00h 00h r/w register r/w register 0077h 0078h interrupt mask mask1: interrupt mask enable register mask2: interrupt mask enable register 00h 00h r /w register r/w register 0079h 007ah 007bh 007ch 007dh 007eh circ config1: configuration register for circ config2: configuration register for circ fifo1: offset between read & write pointer fifo2: status register for fifo c1errs: error number by c1 decoder c2errs: error number by c2 decoder 1ah 19h c0h 00h 00h 00h r/w register r/w register r register r/w register r/w register r/w register 007fh dac dac_csr: control /status register 00h r/w register 0080h 0081h 0082h 0083h 0084h 0085h 0086h 0087h 0088h 0089h 008ah 008bh sac_dsp data_lb: lower byte data register data_mb: middle byte data register data_up: upper nibble data + service bit data_ar_lb: data address coef_ar_lb: coefficient address prog_ar_lb: program address dcpsr: miscellaneous control/data reg. dsp_alu1: alu contains, lsbs dsp_alu2: alu contains, msbs audioc: audio control register dsp_cr: control register shock_cmp: shock comparor 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h 00h r/w register r/w register r/w register r/w register r/w register r/w register r/w register r register r register r/w register r/w register r/w register 008ch 008dh 008eh 008fh not available not available not available not available 0090h 0091h 0092h cxd (crossover detection) g1-equaliser: coefficient value g2-equaliser: coefficient value g3-equaliser: coefficient value 00h 00h 00h r/w register r/w register r/w register 0093h 0094h test selection mux_1: used only on development version mux_2: used only on development version r/w register r/w register address block register name reset status remarks
TDA7522 12/23 4.1 st7 scratch memory map as far as concern st7 scratch memory, it is mapped as follow: 00a0 - 00ff ram 0100 - 017f stack 0180 - 049f ram total is 1024 kbyte. 0095h 0096h 0097h 0098h 0099h 009ah 009bh not available not available not available not available not available not available not available 009ch 009dh adc temp. adc_cr:control register adc_data: adc readout value 009eh 009fh uart tda7521 i/f: data register tda7521 i/f: controll register 00h 00h r/w register r/w register 00a0h to 049fh ram 1024bytes including (stack 128byte) 04a0h to 8fffh not available 9000h to 9fffh 4kbytes of cdtext ram a000h to ffdfh rom 24kbytes ffe0h to ffffh user vectors interrupt and reset vectors address block register name reset status remarks
13/23 TDA7522 4.2 st7 interrupts registers configuration & jump table the TDA7522 peripheral interrupt vector is as follows: -register mask1[7:0]: bit position description interrupt name mask1[7] not used mask1[6] not used mask1[5] sub_irq_q subcode extraction channel q mask1[4] sub_irq_rw subcode extraction channel rw mask1[3] sp_over shock proof mask1[2] i2c_int iic mask1[1] pll_int analog plll mask1[0] dsp_shock sac-dsp register mask2[7:0] bit position description interrupt name mask2[7] not used mask2[6] not used mask2[5] hsy_int digital pll mask2[4] evd_int event detector mask2[3] circ_over cross interleave rs code mask2[2] reserved mask2[1] reserved mask2[0] kif_irq kenwood interface. interrupts vector is reported below: interrupt vector jump address source event source peripheral itcpu11 : ffe6 cir_over circ itcpu10 : ffe8 evd_int event detector itcpu9 : ffea hsy_int hfsync itcpu8 : ffec dsp_shock sac-dsp itcpu7 : ffee pll_int analog pll itcpu6 : fff0 i2c_int i2c itcpu5 : fff2 sp_over shock proof itcpu4 : fff4 sub_irq_rw subcode/control extraction itcpu3 : fff6 sub_irq_q subcode/control extraction itcpu2: fff8 timerint timer interrupt itcpu1 : fffa oextit port c interrupt trap : fffc otrapit software interrupt reset : fffe ostart external reset.
TDA7522 14/23 interrupt management it is fairly flexible, in detail, when an interrupt is served the i flag of the st7 is au- tomatically set (that means no other interrupts are served) and it is reset again only when the routine ends. no interrupts can be missed because of the internal software-based acknowledgement scheme for periph- erals. in order to reset an interrupt coming from a peripheral you have to write to '0' a relevant flag inside it. with the TDA7522 interrupt mask register you just prevent the interrupt signal from coming to the itc (interrupt controller) and so you can change the priority without losing any interrupt. 4.3 development version memory configuration for system application development a dedicated version will be available: the development version gives the possibility of: C use the st7 emulator, for sw debug purpose; C use of program ram or rom for sw execution and modification. see appendix b for detail about memory map and TDA7522 operating modalities as: C TDA7522 booting through i2c C TDA7522 booting from prom C TDA7522 booting from pram. when ram is selected, all application sw shall be loaded through i2c, using the facility as gives by the boot rom. when ram configuration is selected, memory addresses are just overlapping the rom defined in memory map reported in appendix b. TDA7522 development version can work also with emulator; refer to appendix b about the way to enter in st7 emulation mode. notice: due to different environment the following registers can be different between various ver- sions: C iic register 27h: boot bit will disappear in production version C kif registers 75h and 76h are not available on development version C mux registers 93h and 94h will both be available on production version. 5.0 function description 5.1 st7 st7 is based around an industry standard 8 bit core and offers an enhanced instruction set. the processor runs with 8mhz internal clock. due to fully static design of this device, operation down to dc is possible. under software control the st7 can be placed in wait or halt mode for reducing power consumption. st7 can switch off crystal clock to disable complete functions of ic as well. the enhanced instruction set and addressing modes afford real programming potential; in addition to stan- dard 8 bit data management the st7 features true bit manipulation, 8x8 unsigned multiplication and indi- rect addressing modes. the device includes a cpu, rom, ram, i/o, general i/o port, 16 interrupt encoder, timer.
15/23 TDA7522 figure 3. st7 interface overview st7 is supervisor of complete cd system such as servo, main processor communication, dsp control. some tasks of st7 are as follows: C supervisor of all sub blocks C initialization of coefficients for sac-dsp digital servo C initialization of parameters of all sub blocks C focus search and quick restart C coarse adjustments for gain(laser), offset in analog front end C fine adjustments for balance, offset, servo gain in dsp C command interpreter and communication with external mpu C play & subcode control, music search, random search, program play, scan, repeat etc. C one, ten and long tracking jump and pause implementation C linear velocity measurement (disc speed) C computation of the number of tracks for jump C shock proof memory control for data synchronization after shock st7 core peripheral 1 peripheral 2 peripheral n TDA7522 cs address bus ( 0:6 ) data bus ( 0:7 ) imu agu cd text 4 kb y tes ram 24 kb y tes rom timer watchdo g cs cs cs cs address bus ( 0:15 ) data bus ( 0:7 ) 1024 cs general purpose i/o port a,b b y tes ram peripherals
TDA7522 16/23 C constant angular velocity control C toc management C cd-text i/f. 5.2 dsp (sacdsp : servo audio control digital signal processor) dsp is placed as a subset of st7 mpu, which performs digital filter calculation. it consists of 20bit (data) x 16bit (coefficient) multiplier, 38bit accumulator, 20bit data ram, data arbitra- tion between st7, and 19 bits wide program opcode; it can be broken down into two instruction bindings: C instruction binding #1 :arithmetic instructions + parallel move instructions C instruction binding #2 :immediate moves and bit-test jumps sacdsp is very powerful dsp which performs more than 50mips, and it is based on three level pipeline architecture in which concurrent instruction fetch, decode, and execution occur. figure 4. basic i/fs to st7 some tasks of sacdsp are as follows; C dsp: digital filter execution as slave of st7 C focusing and tracking loop filter C sled tracking control C pick-up velocity control during jump scratch ram st7 & peripherals prom data arbitration coeff. arbitration coeff. ram data ram circ decimation filter sac-dsp pdm/pwm audio dac pram loaded audio data path servo data path b y st7
17/23 TDA7522 C some digital filters for adjustments by st7 C sine wave generator for reference of internal adjustment and dac measurement C filter for shock detector C 8 times high end audio over sampling C de-emphasis filter C audio attenuation, mute and balance C internal signal observation feature for user measurement C soft mute and data concealment C audio peak detection C focus error, tracking error generation C equalization of tracking zero cross signal C sound vector enhancement filter. 5.3 data acquisition the digital hf signal is input to an digital equalizer to improved the bit detection. different equalizer coef- ficients are selectable by mpu. the digital data slicer is implemented and the internal slice level is calculated by using a leakage free in- tegrator which is subtracted from hf. the properly levelled efm is delivered to the edge detector and a digital bit clock pll. on this stage, no analog vco is necessary to obtain bit clock but dto (discrete time oscillator) is used. the digital pll block consists of following functions; C adaptive hf equalization C hf hpf for disturbance rejection C digital data slicer C linear interpolation for phase error measurement C run length detection for frequency error measurement C frequency & phase control loop Cdto block C efm bit generation. the serial bit stream signal from the phase detected is sent to a shift register block, which includes differ- ent functions as follows; C serial to parallel conversion C detection of frame sync pattern C protection and insertion of frame sync C bit clock counter (588 bits per frame) C synchronization and sync window logic C 14 to 8 bit demodulation C subcode extraction. 5.4 subcode extraction this block receives the subcode data stream and the related s0/s1 synchronization information from ac- quisition part.
TDA7522 18/23 subcode processing consists of crc parity check and subcode decoder. there are 2 different buffers for q subcode data and for r-w subcode data. q subcode data is transferred to st7 every symbol by interruption and the result of crc is also reported to st7. r-w subcode data especially for cd-text data through program area is arranged to 8bit format from 6bit of r to w, then st7 stores max. 144byte (8pack data) as a fifo to allow the tolerant of reading timing from external mpu for display and also 1block cd-text data from toc area can be transferred to st7 4kbyte cd-text ram. 5.5 circ (error correction) circ (cross interleaving read solomon code) consists of 2 following blocks; C memory control for m1: the fifo memory to absorb jitter of input signals m2: the de-interleaving memory m1 fifo memory compensates the speed deviations of the spindle motor and m2 is used for the de-in- terleaving between the c1 and c2 decoder. the size of the ram is 16kbit and the width is 9bit. each 9 bit word consists of 8 bit data (symbols) and 1 bit validity flag. C error correction this block represents a reed solomon decoder which forms a circ decoder for cd in conjunction with circ ram. there are two decoder circuits: C the first c1 decoder can correct up two random errors in a 32-byte frame, marking uncorrectable errors as erasures C the second c2 decoder can correct up to four erasures in a 28 byte frame. 5.6 shock proof memory control this is a shock proof memory controller which absorbs the interruption due to the shocks. namely, it controls external dram in order to store the audio data into ram earlier than the reading. therefore during shocks the data of the ram can be played without any interruption of the data. the controller handles the data from acquisition and output into ram&timing block. it means the stored data into ram is adat[7-0] before error correction. that is why complete 32 symbols / frame including crc must be stored into ram. it allows the use of audio ram (aram) with defects which is much cheap- er than standard dram. the difference between the classical shock proof memory controller like sony and this new controller is that aram use with defects, the location of the memory and the controller, and also how to fill the data into ram earlier than reading. in case of our controller, clv servo (disk motor controller) varies the disk speed in order to store certain amount of data into ram earlier than the reading. then as long as certain amount of data is kept in the ram in advance, the disk speed is controlled with single speed (normal speed) operation, not always double speed operation like classical solution. mainly the shock proof memory controller consists of 3 controllers. one is the writing pointer controller which controls the memory address for writing data, the another is the reading pointer controller which controls the memory address for reading data, the other is timing arbitra- tion between the reading and writing procedure of the data and address. the output data from the memory is delivered always with fixed data rate without jitters, however the in- coming data is not delivered with fixed rate because of the jitters from the disk and the varied speed of the
19/23 TDA7522 disk motor, so the data rate changes within the capture range of the digital pll in the acquisition part. so output data has no jitters that m1 buffer memory in ram&timing can be replaced with the shock proof memory. (as a huge time base collector instead of m1 buffer memory). 5.7 clv & cav this is a spindle motor (disc motor) servo controller which performs constant linear velocity. (clv) the normal velocity is about from 1.2m/s to 1.4m/s, it means disc speed is of course depending on the location of the pick-up. when pick-up is inside of the disc, disc speed reaches about 8 rotations/sec, and in case of outside, the speed is about 3 rotations/sec. mainly the clv servo consists of 3 controllers, one is rough servo controller which controls to reach certain speed which is within the capture range of the pll (see acquisition part). the another one is frequency servo controller which controls to keep certain frequency of writing clock for fifo memory (m1 memory) comes from circ or shock proof memory controller in future. the other one is phase servo which controls to keep certain constant phase between the writing clock and reading clock for fifo memory. as long as pll is locked, the frequency servo and the phase servo work and normally there is no overflow or underflow of the fifo memory. (fifo memory works as a time base corrector). cav (constant angular velocity) control is done by st7 be detecting the period of eccentricity from the disc. 5.8 audio i/f & dac this block represents both of standard audio serial format based on sony lsi i/f for external dac or cd- rom decoder, and audio bit stream with 1bit delta sigma technic for analog stage of 1bit dac (in tda7521). the delta sigma block consists of functions shown in figure 7.8-1. 5.9 disturbance detector this block detects focus ok, mirror signal, defect signals, (shock is detected by dsp in a tracking loop filter, and interruption is detected in data acquisition block). these disturbance signals are used mainly in servo block to improve the robustness of the controller. mirror signal is used for track jump with tzc (tracking zero cross) signal, it is handled by st7 and also input to 16bit track up/down counter which counts physical number of tracks during tracking jump.
TDA7522 20/23 figure 5. delta sigma functions 5.10 decimation filter this is for down sampling filter of diode signals which have been digitized with oversampling in analog stage (tda7521). input signals are a+c, b+d, e, f diode signals; initial sampling frequency 48fs (2.1168mhz) / 96fs (4.2336mhz) for 2x, 4x speed 6 bit resolutions from adc after downsampling 2fs (88.2khz) / 4fs (176.4khz) for 2x, 4x speed 10 bit resolutions into servo block downsampling ratio 24times. 5.11 pdm/pwm this is a single end output stage of tracking, focusing actuator, sled and spindle motor signal using fol- lowing technic. pulse-width modulation (pwm) pulse density modulation (pdm) there are 8 bit output accuracy. 5.12 spdif this is a decoder to output audio&subcode data based on standard format of aes/ebu digital output. 8 times oversamplin g filter fir fir fir x2 x2 x2 linear interpolation 32 times ovs x256 oversamplin g sw b y dsp hw fs: 44.1khz fs: 11.28mhz 22bit input 1bit output 2nd noise shaper 3rd order sc filter smoothin g filter TDA7522 tda7521 analo g section di g ital section
21/23 TDA7522 5.13 adc characteristics resolution: 8-bits conversion rate: 27.7 khz (assuming a st7 clock equal to 4 mhz) conversion type: successive approximation (12 sar cycles/conversion) operation mode: continuous conversion, asynchronous read/write power supply: 3.3 v +/- 10% voltage reference: 1.25 v analogue input: 0 to 1.25 v .
TDA7522 22/23 drawing is not to scale. tqfp80 - 80 lead quad flat package symb mm inches min typ max min typ max a 1.60 0.063 a1 0.05 0.15 0.002 0.006 a2 1.35 1.40 1.45 0.053 0.055 0.057 b 0.22 0.32 0.38 0.009 0.013 0.015 c 0.09 0.20 0.003 0.008 d 16.00 0.630 d1 14.00 0.551 d3 12.35 0.295 e 0.65 0.0256 e 16.00 0.630 e1 14.00 0.551 e3 12.35 0.295 l 0.45 0.60 0.75 0.018 0.024 0.030 l1 1.00 0.0393 k 3.5 7 3.5 7 a a2 a1 seating plane c 20 21 40 41 60 61 80 e3 d3 e1 e d1 d e 1 b tqfp80l 0.10mm .004 pin 1 identification k l l1 0.25mm gage plane
23/23 TDA7522 . information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics a 1998 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - france - germany - italy - japan - korea - malaysia - malta - mexico - morocco - the neth erlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a.

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