Cirrus Logic CS4955 - Manual (Page 42)

CS4954 CS4955
42 DS278F6
Control Register 5
Address 0 × 05 CONTROL_5 Read/Write Default Value = 00h
Control Register 6
Address 0 × 06 CONTROL_6 Read/Write Default Value = 00h
Bit Number 7 6 5 4 3 2 1 0
Bit Name RSVD LOW IMP EN COM EN L EN C EN R EN G EN B
Default 0 0 0 0 0 0 0 0
Bit Mnemonic Function
7 - reserved
6 LOW IMP selects between tri-state output (0) or output enabled (1) mode of DACs
5 EN COM enable composite (CVBS) DAC 0: high-impedance, 1: enable
4 EN L enable S-VIDEO Y DAC for luma output 0: high-impedance, 1: enable
3 EN C enable S-VIDEO C DAC for chroma output 0: high-impedance, 1: enable
2 EN_R enable RGB video R DAC for red output 0: high-impedance, 1: enable
1 EN_G enable RGB video G DAC for green output 0: high-impedance, 1: enable
0 EN_B enable RGB video B DAC for blue output 0: high-impedance, 1: enable
Bit Number 7 6 5 4 3 2 1 0
Bit Name 656 SYNC
OUT
CLIP OFF
TTXEN
COM2
TTXEN
COM1
TTXEN
SVID
BSYNC DIS GSYNC DIS RSYNC DIS
Default 0 0 0 0 0 0 0 0
Bit Mnemonic Function
7 656 SYNC OUT Enable (=1) output of hsync and vsync when in ITU R.BT656 mode
6 CLIP OFF Clipping input signals disable (0: clipping active 1: no clipping)
5 TTXEN COM2 Enable teletext at the composite 2 output (0: disable teletext, 1 : enable teletext)
4 TTXEN COM1 Enable teletext at the composite 1 output ( 0: disable teletext, 1 : enable teletext)
3 TTXEN SVID Enable teletext at the s-video output ( 0: disable teletext, 1: enable teletext)
2 BSYNC DIS Disable syncs in the blue or v output (0: enable syncs, 1: disable syncs)
1 GSYNC DIS Disable syncs in the green or u output ( 0: enable syncs, 1: disable syncs)
0 RSYNC DIS Disable syncs in the red or y output (0: enable syncs, 1: disable syncs)