參數(shù)資料
型號(hào)： ADV7189
廠商： Analog Devices, Inc.
英文描述： Multiformat SDTV Video Decoder
中文描述： 標(biāo)清多格式視頻解碼器
文件頁(yè)數(shù)： 53/104頁(yè)
文件大?。?/td> 890K
代理商： ADV7189
ADV7189
CRC_ENABLE CRC CGMS-A Sequence (SDP),
Address 0xB2, [2]
For certain video sources, the CRC data bits may have an
invalid format. In such circumstances, the CRC checksum
validation procedure can be disabled. The CGMSD bit goes
high if the rising edge of the start bit is detected within a time
window.
Table 142. CRC_ENABLE Function
CRC_ENABLE
Description
0
No CRC check performed. The CGMSD bit goes
high if the rising edge of the start bit is detected
within a time window.
1*
Use CRC checksum to validate the CGMS-A
sequence. The CGMSD bit goes high for a valid
checksum. ADI recommended setting.
*Default value.
Rev. A | Page 53 of 104
Wide Screen Signaling Data
WSS1[7:0] (SDP), Address 0x91, [7:0], WSS2[7:0] (SDP),
Address 0x92, [7:0]
Figure 31 shows the bit correspondence between the analog
video waveform and the WSS1/WSS2 registers. Note that
WSS2[7:6] are undetermined and should be masked out by
software.
EDTV Data Registers
EDTV1[7:0] (SDP), Address 0x93, [7:0], EDTV2[7:0] (SDP),
Address 0x94, [7:0], EDTV3[7:0] (SDP), Address 0x95, [7:0]
Figure 32 shows the bit correspondence between the analog
video waveform and the EDTV1/EDTV2/EDTV3 registers.
Note that EDTV3[7:6] are undetermined and should be masked
out by software. EDTV3[5] is reserved for future use and, for
now, will contain 0. The three LSBs of the EDTV waveform are
currently not supported.
0
ACTIVE
VIDEO
WSS2[5:0]
WSS1[7:0]
SRUN-IN
START
CODE
0
1
2
3
4
5
6
7
0
1
2
3
4
5
11.0
μ
s
38.4
μ
s
42.5
μ
s
Figure 31. SDP WSS Data Extraction
Table 143. SDP WSS Access Information
Signal Name
WSS1 [7:0]
WSS2 [5:0]
Block
SDP
SDP
Register Location
WSS 1 [7:0]
WSS 2 [5:0]
Address
Register Default Value
Readback Only
Readback Only
145d
146d
91h
92h
EDTV1[7:0]
EDTV2[7:0]
EDTV3[5:0]
NOT SUPPORTED
0
1
3
4
5
6
7
0
1
2
3 4
5
6
7
0
1
2
3
4
5
2
0
Figure 32. SDP EDTV Data Extraction
Table 144. SDP EDTV Access Information
Signal Name
EDTV1[7:0]
EDTV2[7:0]
EDTV3[7:0]
Block
SDP
SDP
SDP
Register Location
EDTV 1 [7:0]
EDTV 2 [7:0]
EDTV 3 [7:0]
Address
Register Default Value
Readback Only
Readback Only
Readback Only
147d
148d
149d
93h
94h
95h
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