adv7189b Analog Devices, Inc., adv7189b Datasheet - Page 50

• Manufacturer Part Number: adv7189b
• Description: Multiformat Sdtv Video Decoder
• Manufacturer: Analog Devices, Inc.

ADV7189B
CGMS Data Registers
CGMS1[7:0], Address 0x96[7:0],
CGMS2[7:0], Address 0x97[7:0],
CGMS3[7:0], Address 0x98[7:0]
F igure 33 shows the bit correspondence between the analog
2 1 9 H
video waveform and the CGMS1/CGMS2/CGMS3 registers.
CGMS3[7:4] are undetermined and should be masked out
by software.
Table 60. CGMS Access Information
Signal Name
CGMS1[7:0]
CGMS2[7:0]
CGMS3[3:0]
Table 61. CCAP Access Information
Signal Name
CCAP1[7:0]
CCAP2[7:0]
+100 IRE
+70 IRE
–40 IRE
0 IRE
50 IRE
40 IRE
Register Location
CGMS 1[7:0]
CGMS 2[7:0]
CGMS 3[3:0]
Register Location
CCAP 1[7:0]
CCAP 2[7:0]
FREQUENCY = F
11.2Ps
REFERENCE COLOR BURST
AMPLITUDE = 40 IRE
10.5
10.003Ps
(9 CYCLES)
r
2.235Ps
0.25Ps
SC
27.382Ps
REF
= 3.579545MHz
r
20ns
Figure 34. Closed-Caption Data Extraction
0
Figure 33. CGMS Data Extraction
1
Rev. B | Page 50 of 104
(CLOCK RUN-IN)
OF 0.5035MHz
2
7 CYCLES
CGMS1[7:0]
12.91Ps
3
153d
154d
150d
151d
152d
4
5
Closed Caption Data Registers
CCAP1[7:0], Address 0x99[7:0],
CCAP2[7:0], Address 0x9A[7:0]
F igure 34 shows the bit correspondence between the analog
2 2 0 H
video waveform and the CCAP1/CCAP2 registers. CCAP1[7]
contains the parity bit from the first word. CCAP2[7] contains
the parity bit from the second word. Refer to the GDECAD
Gemstar Decode Ancillary Data Format, Address 0x4C[0]
section.
6
Address
Address
7
A
R
S
T
T
0x99
0x9A
0
0x96
0x97
0x98
49.1Ps
0
CCAP1[7:0]
1
1
2 3 4 5 6 7 0 1 2 3 4 5 6 7
r
BYTE 0
2
0.5Ps
CGMS2[7:0]
3
33.764Ps
Register Default Value
Readback Only
Readback Only
Readback Only
Register Default Value
Readback Only
Readback Only
4
P
A
R
T
Y
I
5
CCAP2[7:0]
6
BYTE 1
CRC SEQUENCE
7
0
A
R
P
T
Y
I
CGMS3[3:0]
1
2
3