AK8853XQ Datasheet, PDF (24/70 Pages) Asahi Kasei Microsystems – NTSC/PAL/SECAM Digital Video Decoder

[AK8853XQ/ VN]
AGCC-bit: Settings for AGC non-sensing range
AGCC[1:0]-bits Non-sensing range
[00]
±2LSB
[01]
±3LSB
[10]
±4LSB
[11]
None
Notes
–
–
–
–
AGCFRZ-bit: Settings for freezing AGC function
AGCFRZ-bit
AGC status
Notes
[0]
Non-frozen
–
[1]
Frozen
–
Note. The gain value at the time of freezing is maintained during the frozen state, and it is then
possible to read out the gain value via the PGA1,2 Control Register.
AGCTL-bit: Settings for selection of quick or slow transition between peak and sync AGC
AGCTL-bit
AGC transition
Notes
[0]
Quick
–
[1]
Slow
–
7.8 Auto Color Control_ACC
The ACC of the AK8853 measures the level of the input signal color burst, and adjusts the level to 286^a
or 300^b mV, as appropriate. The ACC is not applicable to SECAM. As in AGC, both ACC time
constant and ACC freeze settings can be entered.
a _{NTSC-M,J, NTSC-4.43, PAL-M}
b _{PAL-B, D, G, H, I, N, PAL-Nc, PAL-60}
ACCT[1:0]-bits: Settings for ACC time constant
ACCT[1:0]-bits
Time constant
[00]
Disable
[01]
Fast
[10]
Middle
[11]
Slow
Notes
ACC OFF
T= 2Fields
T= 8Fields
T= 30Fields
ACCFRZ-bit: Settings for freezing ACC function
ACCFRZ-bit
ACC status
Notes
[0]
Non-frozen
–
[1]
Frozen
–
Note. The burst-level setting at the time of freezing is maintained during the frozen state.
The ACC and Color saturation functions operate independently. If ACC is enabled, the color saturation
adjustment is applied to the signal that has been adjusted to the appropriate level by the ACC.
Rev-E-00
24
2008/01