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| G-TIME Electronic Co., Ltd. General Description GT9128 Segment-type 32x4 LCD Driver The GT9128A is a memory mapped segment-type LCD driver which has 128 patterns . It can easily interface to microprocessor or microcontroller via a serial interface like accessing the serial EEPROM. There are only three or four lines required for communication with the host CPU. Features 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) Operates on 2.4V to 5.25V Lower power CMOS process. Compact package. ( 7.0x7.0 mm2 square ) On chip built-in 256kHz oscillator Serial EEPROM like access interface Up to 4 common and 32 segment output. Support 1/2,1/3, or 1/4 duty display. Support 1/2 ,1/3 bias for LCD power display. Programmable timer output for external control. Selectable 2kHz or 4kHz base frequency output. Power down mode to reduce power consumption. Applications Portable sets, cameras, telephones, radio, VCD players, DVD players, MP3 players, digital recorder, home appliance and those applications using LCD display. Typical Application Block Diagram G-TIME Electronic Co., Ltd., reserves the right to change products or specifications without notice. 2003 G-TIME Electronic Co., Ltd., G-TIME is a trademark of G-TIME Electronic Co., Ltd., GT9128 Rev. 1.01 March 2003 1 G-TIME Electronic Co., Ltd. Block Diagram GT9128 Segment-type 32x4 LCD Driver G-TIME Electronic Co., Ltd., reserves the right to change products or specifications without notice. 2003 G-TIME Electronic Co., Ltd., G-TIME is a trademark of G-TIME Electronic Co., Ltd., GT9128 Rev. 1.01 March 2003 2 G-TIME Electronic Co., Ltd. Pin Assignment GT9128 Segment-type 32x4 LCD Driver G-TIME Electronic Co., Ltd., reserves the right to change products or specifications without notice. 2003 G-TIME Electronic Co., Ltd., G-TIME is a trademark of G-TIME Electronic Co., Ltd., GT9128 Rev. 1.01 March 2003 3 G-TIME Electronic Co., Ltd. Pin Descriptions Pad No 1 2 3 4 5 6, 7 8 9 10 11, 12 13~16 17~48 GT9128 Segment-type 32x4 LCD Driver Function Chip select input Data output Shift clock Data input Power ground Not connection ( left open on application ) Power input for LCD voltage divider Power supply input Timer output 2KHz or 4KHz frequency output pins LCD common driver outputs LCD segment driver outputs Pad Name CSB DO SK DATA VSS NC VLCD VDD TOUT BZ, BZB COM0~ COM 3 SEG0~SEG31 I/O I O I I --I -O O O O Absolute Maximum Ratings ( Ta=25, VSS=0V ) Symbol VDD VLCD TIN TA TSTG Parameter Power Supply Voltage LCD Supply Voltage Input voltage Operating Temperature Storage Temperature Rating -0.3 ~ 5.5 -0.3 ~ VDD VSS - 0.3 ~ VDD+0.3 -20 ~ 75 -55 ~ +125 Unit V V V O O C C G-TIME Electronic Co., Ltd., reserves the right to change products or specifications without notice. 2003 G-TIME Electronic Co., Ltd., G-TIME is a trademark of G-TIME Electronic Co., Ltd., GT9128 Rev. 1.01 March 2003 4 G-TIME Electronic Co., Ltd. Symbol Parameter Operating Voltage Operating Current Standby Current Input Low Voltage Input High Voltage TOUT, BZ, BZB, DO TOUT, BZ, BZB, DO Pull-high Resistor 3V 5V 3V 5V 3V 5V 3V 5V 3V 5V 3V 5V 3V GT9128 Segment-type 32x4 LCD Driver D.C. Characteristics ( Ta=25 OC, VSS=0V ) Test Condition Min. 2.4 Typ. Max. Unit 5.25 300 600 5 10 0.6 0.8 3.0 5.0 V A A A A V V V V mA mA mA mA k VDD IDD ISTB VIL VIH IOL IOH RPH LCD on 150 300 0.1 0.3 Power down mode CSB, SK, DI, DO CSB, SK, DI, DO VOL=0.5V VOL=1V VOH=2.3V VOH=4V 0 0 2.0 2.4 0.5 1.5 -0.3 -0.5 30 1.873 4.71 -0.762 -1.09 50 100 A.C. Characteristics ( Ta=25 OC, VSS=0V ) Symbol FSYS FLCD FBZ TCS TCLK TR TF TSU TH TSU1 TH1 Parameter System Clock LCD Clock Buzzer Frequency CSB Pulse width SK Pulse width Rise time of SK Fall time of SK Data setup time to SK Data hold time to SK CSB setup time to SK CSB hold time to SK Test Condition On chip oscillator On chip oscillator On chip oscillator Min. Typ. 256 FSYS / 1024 2.0 or 4.0 250 Max. Unit 1.8/3.6 2.4/4.8 90% of VDD 10% of VDD 2.0 20 20 120 120 100 100 kHz Hz kHz ns s ns ns ns ns ns ns G-TIME Electronic Co., Ltd., reserves the right to change products or specifications without notice. 2003 G-TIME Electronic Co., Ltd., G-TIME is a trademark of G-TIME Electronic Co., Ltd., GT9128 Rev. 1.01 March 2003 5 G-TIME Electronic Co., Ltd. Timing Diagrams GT9128 Segment-type 32x4 LCD Driver G-TIME Electronic Co., Ltd., reserves the right to change products or specifications without notice. 2003 G-TIME Electronic Co., Ltd., G-TIME is a trademark of G-TIME Electronic Co., Ltd., GT9128 Rev. 1.01 March 2003 6 G-TIME Electronic Co., Ltd. GT9128 Segment-type 32x4 LCD Driver Display Buffer to LCD Segments Mapping G-TIME Electronic Co., Ltd., reserves the right to change products or specifications without notice. 2003 G-TIME Electronic Co., Ltd., G-TIME is a trademark of G-TIME Electronic Co., Ltd., GT9128 Rev. 1.01 March 2003 7 G-TIME Electronic Co., Ltd. Function Listing Operation Read Write Command Write ID 110 101 100 Address A5-A0 A5-A0 Data D0-D3 D0-D3 GT9128 Segment-type 32x4 LCD Driver Function Table & Descriptions Comments Read Data from the display RAM. Write Data to The RAM. See command operations Command operations Function CHIP DISABLE OSC ENABLE 1 OSC ENABLE 2 LCD OFF LCD ON BIAS & DUTY TONE OFF TONE ON TONE 2K TONE 4K BEEPER OFF BEEPER ON TIMER DIS TIMER EN CLR TIMER TOUT DUTY TOUT DUTY TOUT 0.5 TOUT 1 TOUT 2 TOUT 4 TOUT 8 TOUT 16 TOUT 16K TOUT 32K ID 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 Command Code 1000-01X0-X 1000-10X0-X 1001-01X0-X 1010-1101-X 1010-1111-X 1010-xyz0-X 1011-0000-X 1011-0010-X 1011-0110-X 1011-0100-X 1011-1X10-X 1011-1X00-X 1100-1000-X 1100-1001-X 1100-1011-X 1100-110X-X 1100-111X-X 1100-0000-X 1100-0001-X 1100-0010-X 1100-0011-X 1100-0100-X 1100-0101-X 1100-0110-X 1100-0111-X Description Turn off oscillator and LCD bias generator ( Default ) System oscillator enable 1 System oscillator enable 2 Turn off LCD bias generator Turn on LCD bias generator xy={0,1,2} : {1/2,1/3,1/4}duty; z={0,1}: {1/3,1/2}bias Turn off tone outputs Turn on tone outputs Tone frequency, 2kHz Tone frequency, 4kHz Beeper disable Beeper enable Disable time base output Enable time base output Clear the contents of time base generator TOUT 50/50 Duty 1/128 duty of TOUT ( not including TOUT 16K and 32K ) TOUT output 0.5Hz cycle TOUT output 1Hz cycle TOUT output 2Hz cycle TOUT output 4Hz cycle TOUT output 8Hz cycle TOUT output 16Hz cycle TOUT output 16kHz cycle TOUT output 32kHz cycle G-TIME Electronic Co., Ltd., reserves the right to change products or specifications without notice. 2003 G-TIME Electronic Co., Ltd., G-TIME is a trademark of G-TIME Electronic Co., Ltd., GT9128 Rev. 1.01 March 2003 8 |
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