AK8851 Datasheet, PDF (59/80 Pages) Asahi Kasei Microsystems – NTSC/PAL/SECAM Digital Video Decoder

ASAHI KASEI
AGC and ACC Control Register (R/W) [Sub Address 0x06]
Register to set the AGC and ACC characteristics.
Sub Address 0x06
bit 7
bit 6
ACCFRZ
ACC1
0
0
bit 5
ACC0
0
bit 4
bit 3
AGCFRZ
Reserved
Default Value
0
0
bit 2
AGCC0
0
[AK8851]
Default Value : 0x00
bit 1
bit 0
AGCT1
AGCT0
0
0
AGC and ACC Control Register Definition
BIT Register Name
AGCT0
bit 0
~
~
AGCT1
AGC Time Constance
bit 1
bit 2
AGCC
AGC Coring Control
bit 3 Reserved Reserved
bit 4 AGCFRZ AGC Freeze
bit 5
ACC0
~
~
Auto Color Control bit
bit 6
ACC1
bit 7 ACCFRZ ACC Freeze
R/W Definition
Set the AGC time constants.
When AGC is set to Disable, each PGA can be set
manually.
[AGCT1:AGCT0] =
R/W 00 : Disable [default]
01 : Fast [T = 1Field]
10 : Middle [T = 7Field]
11 : Slow [T = 29Field]
(T : Time constants)
Set the non-sensing bandwidth of AGC
R/W ^AGCC
0 : +/-2bits
1 : +/-3bits
R/W Reserved
AGC Freeze bit
R/W 0 : AGC is functioned
1 : AGC is frozen
Setting the ACCf function
[ACC1:ACC0] =
00 : Disable ACC [Default]
R/W 01 : Fast [T = 2-Field]
10 : Middle [T = 8-Field]
11 : Slow [T = 30-Field]
(T : Time constants)
ACC Frozen bit
R/W 0 : ACC is functioned
1 : ACC is frozen.
MS0244-E-03
59
Confidential
2005 / 07