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參數(shù)資料
| 型號： | TLV990-40PFBG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | GREEN, PLASTIC, TQFP-48 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 418K |
| 代理商： | TLV990-40PFBG4 |
TLV99040
3V, 10BIT, 40MSPS AREA CCD ANALOG FRONT END
SLAS326A JANUARY 2001 REVISED MARCH 2004
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
REGISTER DEFINITION
hot/cold pixel limit register format
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
X
HFIT
hot/cold pixel limit register description
Bit
Name
Description
D9 D1
X
Reserved
D0
HFIT
Set hot/cold pixel filter
0 Apply Vb
± .8 hot/cold pixel filtering
1 No hot/cold pixel filtering (default)
Default hot/cold pixel limit register value = 0000000001
control register2 format
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
SOF
NOS
ASOF
VGND
INM
ACL
WT3
WT2
WT1
WT0
control register 2 description
BIT
NAME
DESCRIPTION
D9
SOF
0 – Normal mode (default)
1 – Start of frame (only used when exposure time is changed)
When this bit is set to 1, next positive ADCCLK edge indicates that next pixel line is the beginning of a new frame.
The optical black correction will be performed with one line averaging only (digital filtering weight = 1) and without
hot/cold pixel limits.
D8
NOS
Internal test bit, add 255 to optical black pixels when this bit is set to 1; default = 0
D7
ASOF
Enable the auto SOF:
1 Automatically enable SOF at major gain changes (no digital filtering for 1 line)
0 No auto SOF (default)
D6
VGND
Short VIDEOIN to GND when this bit is set to 1; default = 0
D5
INM
This bit selects the input modes.
0 CCD mode (default)
1 Video mode
D4
ACL
0 Video mode, autoclamp (default)
1 Video mode, manual clamp
D3D0
WT3WT0
These three bits set the weight for digital filtering.
WT3
WT2
WT1
WT0
Weight (effect of the averaged result of each optical
black pixel line on overall optical black averaging)
000
0
1
000
1
1/2
001
0
1/2
001
1
1/8
0
1
0
1/16
0
1
0
1
1/32
0
1
0
1/64
0
1
1/128 (default)
1
0
1/256
Default control register2 value = X000000000
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