msm7664 Oki Semiconductor, msm7664 Datasheet - Page 46

• Manufacturer Part Number: msm7664
• Description: Ntsc/pal Digital Video Decoder
• Manufacturer: Oki Semiconductor

¡ Semiconductor
AGC/Pedestal Loop filter control (AGCLF)
Note:
Sync separation level (SSEPL)
Note:
Default
Recommended Value
Default
Recommended Value
AGCLF[7:6] AGC loop filter time constant
AGCLF[5:0] AGC reference level
SSEPL[7]
SSEPL[6:0]
Register Name
Register Name
The AGC convergence time is determined. These registers converge about 4 times
faster by slow-medium-fast steps. In the MGC mode, the amplification is determined
by reference level. Set the SSEPL[7] value to a 0 when the MGC mode is used.
The default setting outputs the pedestal position as a black level.
Pedestal Clamp on/off
Sync. separation level
AGCLF AGCLF AGCLF AGCLF AGCLF AGCLF AGCLF AGCLF
SSEPL
[7]
[7]
0
0
0
0
SSEPL
[6]
[6]
1
1
0
0
Write only
Write only
SSEPL
*01: medium
[5]
[5]
0
0
00: slow
10: fast
11: MGC mode
0
0
*0: Do not use pedestal clamp.
1: Use pedestal clamp (AGC stops operating).
SSEPL
$20 to $1F (*$00): –32 to +31
$40 to $3F (*$00): –64 to +63
[4]
[4]
0
0
0
0
<address: $09>
<address: $0A>
SSEPL
[3]
[3]
0
0
0
0
SSEPL
[2]
[2]
0
0
0
0
SSEPL
PEDL7664-01
[1]
[1]
0
0
0
0
MSM7664
SSEPL
46/76
[0]
[0]
0
0
0
0