GS1500 Datasheet | Gennum Corporation

FEATURES - SMPTE 292M pliant - standards detection/indication for SMPTE 292M levels A/B,C,D/E,F,G/H,I,J/K,L/M - NRZI decoding and SMPTE descrambling with BYPASS option - line CRC calculation, parison - selectable line based CRC re-insertion - H, V, F timing reference signal (TRS) extraction - selectable flywheel for noise immune H, V, F extraction - selectable automatic switch line handling - selectable TRS and line number re-insertion - selectable active picture illegal code re-mapping - ANC data position indication - ANC data extraction via internal FIFOs (1024 bytes on Y and C channels) - configurable FIFO LOAD pulse - 20 bit 3.3V CMOS input data bus - optimized input interface to GS1545 or GS1540 - single +3.3V power supply - 5V tolerant I/O APPLICATIONS SMPTE 292M Serial Digital Interfaces. DESCRIPTION When interfaced to the Gennum GS1545 HDTV Equalizing Receiver or GS1540 Non-Equalizing Receiver, the GS1500 performs the final conversion to word aligned data. The device performs NRZI decoding and de-scrambling as per SMPTE 292M and word-aligns to the ining data stream. Line based CRCs are calculated on the ining data stream and are pared against the CRCs embedded within the data stream. HVF timing information is extracted from the data stream. A selectable internal HVF flywheel provides superior noise immunity against TRS signal errors. The device also detects and indicates the input video signal standard. The GS1500 can detect and re-map illegal code words contained within the active portion of the video signal. The positions of the embedded ANC data are indicated and the ANC data may be extracted and accessed by the user through an internal FIFO interface. Prior to exiting the device, TRS, Line Numbers and CRCs based on internal calculations may be re-inserted into the data stream. ORDERING INFORMATION PART NUMBER GS1500-CQR PACKAGE 128 pin MQFP TEMPERATURE 0°C to 70°C WB_NI BP_DSC BP_FR 3 FW_EN/DIS FAST_LOCK 2 RESET TRS_Y/C F_E/S 2 MUTE EX/CP...