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SDA5250M-2 Datasheet(PDF) 4 Page - Siemens Semiconductor Group |
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SDA5250M-2 Datasheet(HTML) 4 Page - Siemens Semiconductor Group |
4 / 23 page SDA 525X-2 Semiconductor Group 4 1998-10-08 1 General Description As its predecessors SDA 525x the SDA 525x-2 contains a slicer for VPS and TTX, an accelerating acquisition hardware module, a display generator for “Level 1.5” TTX data, and an 8 bit microcontroller running at 333 ns cycle time. The controller with dedicated hardware guarantees flexibility, does most of the internal processing of TTX acquisition, transfers data to/from the external memory interface and receives/transmits data via I 2C user interface. The block diagram shows the internal organization of the SDA 525x-2. The slicer combined with dedicated hardware stores TTX data in a VBI buffer of 746 Byte. The microcontroller firmware performs all the acquisition tasks (hamming- and parity-checks, page search and evaluation of header control bits) once per field. This delta specification describes the differences of the SDA 525x-2 compared to the SDA 525x as described in the preliminary data sheet 1997-09-01. 2 Complete Feature List Including New Features New features compared to SDA 525x-Specification, version 06/96 are printed in italic and bold. As described in the errata sheet 03/97, release 1.0, the newer versions of the SDA 525x and the SDA 525x-2 will not have a serial port (UART) any more. • Acquisition: – Feature selection via special function register – Simultaneous reception of TTX, VPS, and WSS – Fixed framing code for VPS and TTX – Acquisition during VBI – Direct access to VBI RAM buffer – Acquisition of packets x/26, x/27, 8/30 (firmware) – Assistance of all relevant checks (firmware) – 1-bit framing code error tolerance (switchable) • Display: – Features selectable via special function register – 50/60 Hz display (optional 100 Hz) – Level 1.5 serial attribute display pages – Blanking and contrast reduction output – 8 direct addressable display pages for SDA 5250-2, SDA 5254-2 to SDA 5257-2 (optional 10 pages) – 1 direct addressable display page for SDA 5251-2 to SDA 5253-2 – 12 × 10 character matrix – 96 character ROM (standard G0 character set) – 156 national option characters for 12 languages (for European version) – 288 characters for X/26 display – 64 block mosaic graphic characters – 32 characters for OSD in expanded character ROM + 32 characters inside OSD box |
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