参数资料
型号: TVP5157PNPR
厂商: TEXAS INSTRUMENTS INC
元件分类: 颜色信号转换
英文描述: COLOR SIGNAL DECODER, PQFP128
封装: GREEN, PLASTIC, HTQFP-128
文件页数: 66/108页
文件大小: 1395K
代理商: TVP5157PNPR
SLES243E
– JULY 2009 – REVISED MARCH 2011
Table 4-36. Back-End AGC Control
Subaddress
2Eh
Default
08h
7
6
5
4
3
2
1
0
Reserved
1
Peak
Color
Sync
This register allows disabling the back-end AGC when the front-end AGC uses specific amplitude references (sync-height, color burst or
composite peak) to decrement the front-end gain. For example, writing 09h to this register disables the back-end AGC whenever the
front-end AGC uses the sync-height to decrement the front-end gain.
Peak
Disables back-end AGC when the front-end AGC uses the composite peak as an amplitude reference.
0
Enabled (default)
1
Disabled
Color
Disables back-end AGC when the front-end AGC uses the color burst as an amplitude reference.
0
Enabled (default)
1
Disabled
Sync
Disables back-end AGC when the front-end AGC uses the sync height as an amplitude reference.
0
Enabled (default)
1
Disabled
Table 4-37. AFE Fine Gain
Subaddress
34h-35h
Default
086Ah
Subaddress
7
6
5
4
3
2
1
0
34h
FGAIN [7:0]
35h
Reserved
FGAIN [13:8]
FGAIN [13:0]
This fine gain applies to CVBS. Fine Gain = (1/2048)
× FGAIN where 0 ≤ FGAIN ≤ 16383. This register works only in manual gain
control mode. When AGC is active, writing to any value is ignored.
00 0000 0000 0000 to
Reserved
00 0011 1111 1111
00 0100 0000 0000
0.5
00 1000 0000 0000
1
00 1000 0110 1010
1.052 (default)
00 1100 0000 0000
1.5
11 1111 1111 1111
7.9995
60
Internal Control Registers
Copyright
2009–2011, Texas Instruments Incorporated
Product Folder Link(s): TVP5158 TVP5157 TVP5156
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