ST92195C STMicroelectronics, ST92195C Datasheet - Page 165

• Manufacturer Part Number: ST92195C
• Description: 48-96 Kbyte Rom Hcmos Mcu With On-screen Display And Teletext Data Slicer
• Manufacturer: STMicroelectronics

ST92195C/D - VPS & WSS SLICER
7.8 VPS & WSS SLICER
7.8.1 Introduction
The VPS/WSS digital sections perform several
functions:
Figure 92. VPS/WSS Block Diagram
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Separate the horizontal and vertical sync
signals
Determine the field and line information (in
conjunction with the Sync Extractor)
Wss Word
VSync
VPS-WSS
End Word
REGISTER
CK @5MHz
Vps Word
WSS
Comparator
Register
PLL
Shift
VPS
WSS
Word
+
Data
Data
Process the data stream
Generate timing and windows for datastream
information extraction
Load data into the registers and report any bi-
phase errors found on any bytes (each word
information has an error report to help increase
performance, especially during weak signals)
REGISTER
(CVBS2)
Wss Window
Error Biphase
VPS
Biphase
Check
Start Code valid
Start Code
Check
VPS (from CVBS1)
Vps Window
VR02093A
of