SAA5500PS Philips Semiconductors, SAA5500PS Datasheet - Page 27

• Manufacturer Part Number: SAA5500PS
• Description: Standard TV Microcontrollers with On-Screen Display(OSD)
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Notes
1. This flag is set by software and reset by hardware.
2. This flag is set by hardware and must be reset by software.
3. Valid range TXT mode 0 to 24.
4. Valid range TXT mode 0 to 39.
5. Must be set to 55H to disable Watchdog Timer when active.
1999 Oct 27
Watchdog Timer Key (WDTKEY)
WKEY7 to WKEY0
Wide Screen Signalling 1 (WSS1)
WSS<3:0> ERROR
WSS3 to WSS0
Wide Screen Signalling 2 (WSS2)
WSS<7:4> ERROR
WSS7 to WSS4
Wide Screen Signalling 3 (WSS3)
WSS<13:11> ERROR
WSS13 to WSS11
WSS<10:8> ERROR
WSS10 to WSS8
XRAMP
XRAMP7 to XRAMP0
Standard TV microcontrollers with
On-Screen Display (OSD)
BIT
(5)
Watchdog Timer Key
error in WSS<3:0> (logic 1)
signalling bits to define aspect ratio (group 1)
error in WSS<7:4> (logic 1)
signalling bits to define enhanced services (group 2)
error in WSS<13:11> (logic 1)
signalling bits to define reserved elements (group 4)
error in WSS<10:8> (logic 1)
signalling bits to define subtitles (group 3)
internal RAM access upper byte address
27
FUNCTION
Preliminary specification
SAA55xx