STV0042A Datasheet, PDF (17/24 Pages) STMicroelectronics – SATELLITE SOUND AND VIDEO PROCESSORS

CONTROL REGISTERS (continued)
Reg 2 write only
Bit (default F7_HEX)
0 H Select video source for scart 1 O/P
1 H Select video source for scart 1 O/P
2 H Select video source for scart 1 O/P
3 L Select 4.000MHz or 8.000MHz clock speed (L = 8MHz)
4 H Select audio source for volume output (Switch K1)
5 H Select audio source for volume output (Switch K1)
6 H Select Left/Right/Stereo for volume output
7 H Select Left/Right/Stereo for volume output
Reg 3 write only
Bit (default F7HEX)
0 H Select video source for scart 2 O/P
1 H Select video source for scart 2 O/P
2 H Select video source for scart 2 O/P
3 L Video deemphais 2 / 22kHz (H : 22kHz)
4 H Select audio source for Scart 2 output (Switch K5)
5 H Select audio source for Scart 2 output (Switch K5)
6 H Audio deemphasis select (Switch K2)
7 H Audio deemphasis select (Switch K2)
Reg 4 write only
Bit (default BFHEX)
0 H Not to be used
1 H Not to be used
2 H Not to be used
3 H Stand-by or low power mode (H = low power)
4 H Not to be used
5 H Not to be used
6 L Not to be used
7 H Not to be used
Reg 5 write only
Bit (default B5_HEX)
0 H FM deviation selection -- default value for 50kHz modulation
1 L FM deviation selection
2 H FM deviation selection
3 L FM deviation selection
4 H FM deviation selection
5 H FM deviation selection (L = double the FM deviation)
6 L Not to be used
7 H Not to be used
Reg 6 write/read
Bit (default 86HEX)
0 L Status of I/O
1 H Select data direction of I/O 1 ( H = output)
2 H Select frequency synthesizer 1 OFF/ON (L = OFF)
3 L Select frequency synthesizer 2 OFF/ON (L = OFF)
4 L Select RF source (L = OFF) to FM det 1
5 L Select RF source (L = OFF) to FM det 2
6 L Select frequency for PLL synthesizer - LSB (bit 0) of 10-bit value
7 H Select frequency for PLL synthesizer - bit 1 of 10-bit value
STV0042A
17/24