STI5512 查看數據表（PDF） - STMicroelectronics

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STI5512

SET TOP BOX BACKEND DECODER WITH INTEGRATED HOST PROCESSOR

STMicroelectronics 

CONFIDENTIAL STi5512

PAL/NTSC/SECAM encoder with teletext and closed caption

The on-chip digital encoder provides analog video output to PAL, NTSC and SECAM standards, with the following

features:

• RGB and YUV outputs:

• CVBS, Y, C outputs,

• Close caption,

• Double DENC function,

• Support for placement of teletext, WSS (wide screen signalling) and VPS on any line,

• VBI insertion in square pixel mode,

• Genlock support for locking to external source and display of OSD over analogue source using SCART fast

switch facility.

Transport demultiplexor

The STi5512 Programmable Transport Interface features:

• Inputs from a LinkIC or IEEE 1394 link layer controller

• A DVB Descrambler

• Demultiplexing of transport stream by PID

• Section filtering

• DMA and buffering of streams in memory

MPEG audio decoder

The STi5512 incorporates a 2-channel MPEG-1 audio decoder, with an interface for connection to external audio

decoders. The audio decoder supports layer I and layer II.

System microcontroller

The STi5512 incorporates a ST20-C2 CPU. The ST20 micro-core family has been developed by STMicroelectronics to

provide the tools and building blocks to enable the development of highly integrated application specific 32-bit devices

at the lowest cost and fastest time to market. The ST20 macrocell library includes the ST20Cx family of 32-bit VL-RISC

(variable length reduced instruction set computer) micro-cores, embedded memories, standard peripherals, I/O,

controllers and ASICs. The STi5512 32-bit VL-RISC for host functions and application code runs at up to 60 MHz.

The performance offered by the ST20 32-bit micro-core allows the following operations to be performed in software:

• Device drivers and synchronization

• System management functions

• Electronic program guide and user interface

• Conditional access control

• Interpretation and execution of loadable application programs

The use of a 32-bit CPU enables advanced graphics routines to be employed for on-screen display functions, allowing

fast turnaround of system upgrades. Source code software licences are available from STMicroelectronics for items 1

and 2 in the list above, and a library of graphics functions to assist with the Electronic program guide and user interface.

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