EVAL-ADV7180LFEBZ Analog Devices Inc, EVAL-ADV7180LFEBZ Datasheet - Page 62

• Manufacturer Part Number: EVAL-ADV7180LFEBZ
• Description: BOARD EVAL FOR ADV7180 LFCSP
• Manufacturer: Analog Devices Inc

Specifications of EVAL-ADV7180LFEBZ

• Main Purpose: Video, SDTV Video Decoder - NTSC, PAL, SECAM
• Embedded: No
• Utilized Ic / Part: ADV7180
• Primary Attributes: CVBS (Composite), Y/C (S-video), and YPrPb (Component) Inputs
• Secondary Attributes: 8-bit ITU-R BT.656 YCrCb 4:2:2 Output
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADV7180
CGMS and WSS
The CGMS and WSS data packets convey the same type of
information for different video standards. WSS is for PAL and
CGMS is for NTSC; therefore, the CGMS and WSS readback
registers are shared. WSS is biphase coded; the VDP performs a
biphase decoding to produce the 14 raw WSS bits in the CGMS/
WSS readback I
CGMS_WSS_CLEAR, CGMS/WSS Clear, Address 0x78[2],
User Sub Map, Write Only, Self-Clearing
Setting CGMS_WSS_CLEAR to 1 reinitializes the CGMS/WSS
readback registers.
Table 81. CGMS Readback Registers
Signal Name
CGMS_WSS_DATA_0[3:0]
CGMS_WSS_DATA_1[7:0]
CGMS_WSS_DATA_2[7:0]
1
These registers are readback registers; default value does not apply.
+100 IRE
+70 IRE
–40 IRE
2
C registers and to set the CGMS_WSS_AVL bit.
0 IRE
11.0µs
11.2µs
SEQUENCE
1
RUN-IN
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]
REF
START
CODE
38.4µs
42.5µs
0
0
VDP_CGMS_WSS_DATA_2
Figure 47. CGMS Waveform
VDP_CGMS_WSS_DATA_2
Figure 46. WSS Waveform
1
1
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2
2
3
3
4
4
5
5
CGMS_WSS_AVL, CGMS/WSS Available, Address 0x78[2],
User Sub Map, Read Only
When CGMS_WSS_AVL is 0, CGMS/WSS was not detected.
When CGMS_WSS_AVL is 1, CGMS/WSS was detected.
VDP_CGMS_WSS_DATA_0[3:0], Address 0x7D[3:0];
VDP_CGMS_WSS_DATA_1[7:0], Address 0x7E[7:0];
VDP_CGMS_WSS_DATA_2[7:0], Address 0x7F[7:0];
User Sub Map, Read Only
These bits hold the decoded CGMS or WSS data.
Refer to Figure 46 and Figure 47 for the I
CGMS bit mapping.
6
6
7
7
VDP_CGMS_WSS_
DATA_1[5:0]
0
0
49.1µs ± 0.5µs
1
VDP_CGMS_WSS_DATA_1
1
2
2
3
3
4
4
5
125
126
127
5
6
ACTIVE
Address (User Sub Map)
CRC SEQUENCE
VIDEO
7
VDP_CGMS_WSS_
DATA_0[3:0]
0
1
2
C-to-WSS and I
2
3
0x7D
0x7E
0x7F
2
C-to-