adv7188 Analog Devices, Inc., adv7188 Datasheet - Page 66

• Manufacturer Part Number: adv7188
• Description: Multiformat Sdtv Video Decoder With Fast Switch Overlay Support
• Manufacturer: Analog Devices, Inc.

ADV7188
Table 79. CGMS Readback Registers
Signal Name
CGMS_WSS_DATA_0 [3:0]
CGMS_WSS_DATA_1 [7:0]
CGMS_WSS_DATA_2 [7:0]
1
Table 80. Closed Captioning Readback Registers
Signal Name
CCAP_BYTE_1 [7:0]
CCAP_BYTE_2 [7:0]
1
The register is a readback register; the default value does not apply.
The register is a readback register; the default value does not apply.
+100 IRE
+70 IRE
–40 IRE
0 IRE
50 IRE
40 IRE
11.0µs
FREQUENCY = F
11.2µs
REFERENCE COLOR BURST
AMPLITUDE = 40 IRE
SEQUENCE
1
10.5 ± 0.25µs
Register Location
VDP_CCAP_DATA_0 [7:0]
VDP_CCAP_DATA_1 [7:0]
RUN-IN
(NINE CYCLES)
10.003µs
2.235µs ± 20ns
Register Location
VDP_CGMS_WSS_DATA_0 [3:0]
VDP_CGMS_WSS_DATA_1 [7:0]
VDP_CGMS_WSS_DATA_2 [7:0]
SC
Figure 41. CC Waveform and Decoded Data Correlation
27.382µs
REF
= 3.579545MHz
START
CODE
1
38.4µs
42.5µs
0
0
VDP_CGMS_WSS_DATA_2
Figure 40. CGMS Waveform
VDP_CGMS_WSS_DATA_2
Figure 39. WSS Waveform
1
1
Rev. A | Page 66 of 112
(CLOCK RUN IN)
SEVEN CYCLES
OF 0.5035MHz
2
2
12.91µs
3
3
4
4
5
5
6
6
7
7
VDP_CGMS_WSS_
DATA_1[5:0]
0
A
R
S
T
T
0
49.1µs ± 0.5µs
0
1
VDP_CGMS_WSS_DATA_1
VDP_CCAP_D ATA_0
1
1
2 3 4 5 6 7 0 1 2 3 4 5 6 7
2
2
Dec
121d
122d
3
3
4
33.764µs
4
R
P
A
T
Y
I
5
Dec
125d
126d
127d
VDP_CCAP_D ATA_1
5
Address (User Sub Map)
6
ACTIVE
Address (User Sub Map)
CRC SEQUENCE
VIDEO
7
VDP_CGMS_WSS_
DATA_0[3:0]
0
P
A
R
Y
T
I
1
Hex
0x79
0x7A
2
Hex
0x7D
0x7E
0x7F
3