for further information contact your local stmicroelectronics sales office. may 2013 docid023591 rev 3 1/4 4 stid125 docsis 3.0 and video front-end fo r interactive dvr set-top box data brief features ? dual cpu architecture ? one for docsis? and one for host including erouting and voip management ? arm cortex-a9 770 mhz, dual-core cpu with neon? simd co-processor ? docsis 3.0 data cable modem: ? up to eight downstream channels (up to 400 mbit/s) ? up to four upstream channels ? 12 qam demodulation channels ? qam video operations independent from docsis ? digital direct interface to full band tuners ? voip through arm cortex-a9 cpu: ? one line voip with packetcable? 1.5 or 2.0 reference software ? 2 x pci-e interfaces for wifi connectivity ? ddr2/3, 8/16-bit lmi interface ? serial nor, spi interface ? 3 x gbits ethernet ports ? flexible channel allocation for active standby power consumption reduction description stid125 is stmicroelectronics? next generation front-end device for interactive cable gateway and set-top box applications. stid125 provides a solution for operators to specify a range of very high-performance docsis 3.0 and dvb-c video channels. a total of 12 demodulation channels are available, four video, four docsis and four flexible (either video or docsis). a powerful dual-core cpu allows telephony and data distribution including routing/switching and firewalling. this allows stid125 to use the associated set-top box as a home, triple-play gateway (combined voip, video and broadband). audio dsp h.264 encoder docsis 3.0 ddr3 dram host processing network processor dual-core mp arm cortex-a9 peripherals uart, i2c, * 3 , 2 ? l2 cache 512 kbyte 8/16-bit interface connectivity ethernet gmac x 3 pci-e x 2 docsis qam x 4 interfaces video qam x 4 1 ghz cable fe interface telephony interface spi serial nor flexible qam x 4 docsis mac phy docsis processor st40-300 oob modem www.st.com
introduction stid125 2/4 docid023591 rev 3 1 introduction the stid125 docsis 3.0 media gateway integr ates multi-stream transport processing, real-time cpu, erouter/switch, embedded cabl e modem, embedded digital voice adaptor, voip, three gmac interfaces and two pci-e interfaces. features benefits dual-core, arm cortex-a9, 770 mhz applications cpu with 512 kbyte l2 cache. enables high performance networking and voip. docsis 3.0, mac and phy for up to 400 mbit/s high bandwidth downstream capability. front-end solution to enable a complete triple play set-top box or gateway. video over docsis extraction and mpeg transport stream tran smissions to backend device. stid125 provides high bit rate data, a complete telephony subsystem and live tv video demodulation. with the capability to extract and merge video over ip with live video, stid125 is the perfect solution to bridge conventional video distribution to a full ip solution. 12 qam channels (four docsis, four flexible and four video). with 12-channels capability, stid125 can provide an optimized solution for next generation gateway devices, allowing video distribution to several clients inside the home. telephony, voip with packetcable? 1.5 and 2.0 complete stack. stid125 enables a complete, cost-effective telephony solution, with external components reduced down to a standard slic codec. a direct interface to an rf dect or cat-iq tm device is available to allo w the integration of the dect functionality with th e packet cable or set-top box stack. erouter and firewall for data distribution through gbit ethernet mac or pci-e interfaces. stid125 manages the broadband data distribution within the home. the gigabi t ethernet interfaces allow connection to a switch or phy, or to home networking technology devices such as moca, homeplug or hpna. the pci-e interfaces permit efficient data transfer through wifi devices.
docid023591 rev 3 3/4 stid125 revision history 2 revision history table 1. document revision history date revision changes 28-aug-2012 1 initial version. 10-apr-2013 2 ? updated cover page description. ? updated features list, cover page diagram for ethernet. ? updated chapter 1: introduction for ethernet. 07-may-2013 3 updated the document for number of pci-e interfaces.
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