SAA5531 Philips Semiconductors, SAA5531 Datasheet - Page 28

• Manufacturer Part Number: SAA5531
• Description: Enhanced 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.
2000 Feb 23
Text Register 22 (TXT22)
GPF7 to GPF75
GPF4
GPF3
GPF2
GPF1
Watchdog Timer (WDT)
WDV7 to WDV0
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
Enhanced TV microcontrollers with
On-Screen Display (OSD)
BIT
(5)
general purpose register, bits defined by mask programmable bits
1 to 10 pages available (logic 1)
PWM0, PWM1, PWM2 and PWM3 outputs routed to Port 2.1 to Port 2.4
respectively (logic 1)
closed caption acquisition available (logic 1)
text acquisition available (logic 1)
Watchdog Timer period
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
28
FUNCTION
Preliminary specification
SAA55xx