saa5290 NXP Semiconductors, saa5290 Datasheet - Page 22

• Manufacturer Part Number: saa5290
• Description: Page Economy Teletext/tv Microcontroller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 12 CH1 and CH0 selection
February 1995
TXT12 - Teletext register 12 (READ only)
625/525 SYNC
ROM VER R0 to R4
TXT ON
VIDEO QUALITY
TXT13 - Teletext register 13 (READ only)
TXT I/FACE BUSY
One page Economy Teletext/TV
microcontroller
REGISTER
CH1
0
0
1
1
Mask programmable to identify character set version.
Teletext power has been applied to the device (logic 1).
CVBS input can be locked on by the teletext decoder (logic 1).
TXT0 to TXT11 (logic 1). This register bit performs the software handshake to the teletext
control registers.
A 625 line CVBS signal (logic 0), or a 525 line CVBS signal (logic 1) is being input.
Text interface busy and no access for either READ or WRITE is allowed to SFRs
CH0
0
1
0
1
22
FUNCTION
INPUT PIN
ADC0
ADC1
ADC2
none
Preliminary specification
SAA5290