Cirrus Logic CS4955 - Manual (Page 46)

CS4954 CS4955
46 DS278F6
Closed Caption Data Register
Address 0 × 19 CC_21_1 Read/Write Default Value = 00h
0 × 1A CC_21_2 00h
0 × 1B CC_284_1 00h
0 × 1C CC_284_2 00h
Wide Screen Signaling Register 0
Address 0 × 1E WSS_REG_0 Read/Write Default Value = 00h
Bit Mnemonic Function
7:0 CC_21_1 first closed caption databyte of line 21
7:0 CC_21_2 second closed caption databyte of line 21
7:0 CC_284_1 first closed caption databyte of line 284
7:0 CC_284_2 second closed caption databyte of line 284
Bit Number 7 6 5 4 3 2 1 0
Bit Name WSS_23 WSS_22 WSS_21 WSS_20 WSS_19 WSS_18 WSS_17 WSS_16
Default 0 0 0 0 0 0 0 0
Bit Mnemonic Function
7 WSS_23 Enable wide screen signalling (enable =1)
6 WSS_22
PAL: enable WSS (enable = 1) on line 23 of field 2,
NTSC: don’t care
5 WSS_21 PAL: group 4, bit 13, NTSC: don’t care
4 WSS_20 PAL: group 4, bit 12, NTSC: don’t care
3 WSS_19 PAL: group 4, bit 11, NTSC: bit 20
2 WSS_18 PAL: group 3, bit 10, NTSC: bit 19
1 WSS_17 PAL: group 3, bit 9, NTSC: bit 18
0 WSS_16 PAL: group 3, bit 8, NTSC: bit 17