adv7181b Analog Devices, Inc., adv7181b Datasheet - Page 84

• Manufacturer Part Number: adv7181b
• Description: Multiformat Sdtv Video Decoder
• Manufacturer: Analog Devices, Inc.

ADV7181B
Subaddress
0x99
0x9A
0x9B
0x9C
0x9D
0xB2
0xC3
Register
CCAP1
(Read Only)
CCAP2
(Read Only)
Letterbox 1
(Read Only)
Letterbox 2
(Read Only)
Letterbox 3
(Read Only)
CRC Enable
Write
Register
ADC
SWITCH 1
Bit Description
CCAP1[7:0]
Closed caption data register.
CCAP2[7:0]
Closed caption data register.
LB_LCT[7:0]
Letterbox data register.
LB_LCM[7:0]
Letterbox data register.
LB_LCB[7:0]
Letterbox data register.
Reserved.
CRC_ENABLE. Enable CRC checksum
decoded from CGMS packet to
validate CGMSD.
Reserved.
ADC0_SW[3:0]. Manual muxing
control for ADC0.
ADC1_SW[3:0]. Manual muxing
control for ADC1.
Rev. B | Page 84 of 100
7 6
x x
x x
x x
x x
x x
0 0
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
1 0
1 0
1 0
1 0
1 1
1 1
1 1
1 1
5
x
x
x
x
x
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
4 3
x
x
x
x x
x x
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Bits
x
x
x
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
2
x
x
x
x
x
0
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
x
x
x
x
x
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
x
x
x
x
x
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Comments
CCAP1[7] contains parity
bit for byte 0
CCAP2[7] contains parity
bit for byte 0
Reports the number of
black lines detected at the
top of active video
Reports the number of
black lines detected in the
bottom half of active video
if subtitles are detected
Reports the number of
black lines detected at the
bottom of active video.
Set as default
Turn off CRC check
CGMSD goes high with
valid checksum
Set as default
No connection
AIN2
No connection
No connection
AIN4
AIN6
No connection
No connection
No connection
AIN1
No connection
No connection
AIN3
AIN5
No connection
No connection
No connection
No connection
No connection
No connection
AIN4
AIN6
No connection
No connection
No connection
No connection
No connection
No connection
AIN3
AIN5
No connection
No connection
Notes
This feature
examines the active
video at the start
and at the end of
each field. It enables
format detection
even if the video is
not accompanied
by a CGMS or WSS
sequence.
SETADC_sw_
man_en = 1.
SETADC_sw_
man_en = 1.