Cirrus Logic CS4955 - Manual (Page 41)

CS4954 CS4955
DS278F6 41
Control Register 3
Address 0 × 03 CONTROL_3 Read/Write Default Value = 00h
Control Register 4
Address 0 × 04 CONTROL_4 Read/Write Default Value = 3Fh
NOTE: 1. The FIELD pin (pin 9) remains an output pin in SLAVE mode. However, the FIELD pin state does not
toggle in SLAVE mode and its output state should be considered random.
Bit Number 7 6 5 4 3 2 1 0
Bit Name RESERVED FD THR C1 FD THR C2 FD THR SV FD THR EN CBAR
Default 0 0 0 0 0 0 0 0
Bit Mnemonic Function
7:5 - reserved
4 FD THR C1 feedthrough enabled for composite 1 output (0 = off, 1 = on)
3 FD THR C2 feedthrough enabled for composite 2 output (0 = off, 1 = on)
2 FD THR SV feedthrough enabled for s-video (on luma signal) (0 = off, 1 = on)
1 FD THR_EN Enable (1 = enable) input to feed through during inactive lines
0 CBAR internal color bar generator (0 = off, 1 = on)
Bit Number 7 6 5 4 3 2 1 0
Bit Name CB_H_SEL CB_FLD_SEL (1) COMDAC_PD SVIDLUM_PD SVIDCHR_PD R_PD G_PD B_PD
Default 0 0 1 1 1 1 1 1
Bit Mnemonic Function
7 CB_H_SEL Composite Blank / HSYNC output select (1 = CB select, 0 = HSYNC select)
6 CB_FLD_SEL Composite Blank / FIELD output select (1 = CB select, 0 = FIELD select) (1)
5 COMDAC_PD
power down composite DAC
0: power up, 1: power down
4 SVIDLUM_PD
power down luma s-video DAC
0: power up, 1: power down
3 SVIDCHR_PD
power down chroma s-video DAC
0: power up, 1: power down
2 R_PD
power down red rgb video DAC
0: power up, 1: power down
1 G_PD
power down green rgb video DAC
0: power up, 1: power down
0 B_PD
power down blue rgb video DAC
0: power up, 1: power down