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Q67101-H6773 Datasheet(PDF) 6 Page - Siemens Semiconductor Group |
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Q67101-H6773 Datasheet(HTML) 6 Page - Siemens Semiconductor Group |
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6 / 190 page  PSB 7238 Introduction Semiconductor Group 6 Data Sheet 1998-07-01 In a Videophone system using the 8 ×8 (formerly IIT) VCP (Video Codec and Multimedia Communications Processor) the Siemens PSB 7238 can work standalone without the need of external initialization. The default configuration of the JADE is such, that no host is needed in this case and the full communication is done between the VCP and the Siemens PSB 7238. The voice compression algorithms are implemented by an embedded 16-bit fixed point Digital Signal Processor with all memories internal and no external memory needed. Integration of these and other features, as well as perfectly matched interfaces with other ICs allows for the implementation of highly optimized, low cost system solutions e.g. for Videophones, Data-over-voice and Channel Multiplexing equipment. For system integration, two serial HDLC/transparent data channels are implemented which can be serviced by an attached host (or the on-chip DSP). System functions and communication between the chip and an external controller is supported by a full-duplex 256-byte on-chip mailbox communication memory. The circuit is offered in a Quad Flat Pack package with 100 pins (P-TQFP-100: size 14 × 14 mm, pitch 0.5 mm, height 1.4 mm). Note: This Data Sheet gives a thorough description of the functions and hardware that forms the base of PSB 7238. It includes information (e.g. External Memory Interface) that is not needed for the PSB 7238 as a “ready to use plug and play” G.728/G.723/G.722/G.711 audio compression device. |
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