STV0042A datasheet(17/24 Pages) STMICROELECTRONICS

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Reg 2

write only

Bit (default F7HEX)

Select video source for scart 1 O/P

Select 4.000MHz or 8.000MHz clock speed (L = 8MHz)

Select audio source for volume output (Switch K1)

Select Left/Right/Stereo for volume output

Reg 3

write only

Bit (default F7HEX)

Select video source for scart 2 O/P

Video deemphais 2 / 22kHz (H : 22kHz)

Select audio source for Scart 2 output (Switch K5)

Audio deemphasis select (Switch K2)

Reg 4

write only

Bit (default BFHEX)

Not to be used

Stand-by or low power mode (H = low power)

Not to be used

Reg 5

write only

Bit (default B5HEX)

FM deviation selection -- default value for 50kHz modulation

FM deviation selection

FM deviation selection (L = double the FM deviation)

Not to be used

Reg 6

write/read

Bit (default 86HEX)

Status of I/O

Select data direction of I/O 1 ( H = output)

Select frequency synthesizer 1 OFF/ON (L = OFF)

Select frequency synthesizer 2 OFF/ON (L = OFF)

Select RF source (L = OFF) to FM det 1

Select RF source (L = OFF) to FM det 2

Select frequency for PLL synthesizer - LSB (bit 0) of 10-bit value

Select frequency for PLL synthesizer - bit 1 of 10-bit value

CONTROL REGISTERS (continued)

STV0042A

17/24

STV0042A 数据表(PDF) 17 Page - STMicroelectronics

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