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參數資料
| 型號： | TLV990APFB |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | PLASTIC, TQFP-48 |
| 文件頁數： | 5/24頁 |
| 文件大小： | 328K |
| 代理商： | TLV990APFB |
TLV990A
3-V, 10-BIT, 28-MSPS AREA CCD AND VIDEO SIGNAL PROCESSOR
SLAS297 – SEPTEMBER 2000
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
REGISTER DEFINITION
optical black setup register format
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
OMUX1
OMUX0
HYS
X
SOFW1
SOFW0
MP
PN2
PN1
PN0
optical black setup register description
BIT
NAME
DESCRIPTION
D8, D9
OMUX1,
OMUX0
These two bits multiplex digital output (data presented at D[9:0] pins):
OMUX1
OMUX0
0
D[9:0] = ADC output (default)
0
1
D[9:0] = ADC output
1
0
D[9] = fine/coarse (1/0) autocorrection flag
D[8] = coarse DAC sign
D[7:0] = coarse DAC value
1
D[9] = fine/coarse (1/0) autocorrection flag
D[8] = fine DAC sign
D[7:0] = fine DAC value
D7
HYS
Sets the hysteresis
0 – Apply hysteresis to FDAC (default)
1 – No hysteresis
D6
X
Reserved
D5, D4
SOFW1,
SOFW0
These two bits set the digital filter weight when SOF is activated (the SOF bit in control register 2 is set to 1).
SOFW1
SOFW0
Weight
0
(default)
0
1
0
2
1
3
D3
MP
When this bit is 1, the number of optical black pixels to be averaged per line (2N) is multiplied by 3.
By setting the MP and PN2–PN0 bits together, the number of optical black pixels can be programmed to have the follow-
ing numbers:
1, 2, 3 (1X3), 4, 6 (2
×3), 8, 12 (4×3), 16, 24 (8×3), 32, 48 (16×3), 64, 96 (32×3), and 192 (64×3).
Default: MP = 0, no multiplication
D2–D0
PN2–PN0
Number of optical black pixels per line to average = 2N
N can be 0, 1, 2, 3, 4, 5, and 6. Or number of pixels per line can be 1, 2, 4, 8 (default), 16, 32, or 64.
The maximum number of pixels per line is 64, even if N>6.
Default optical black calibration register value = 0000000011
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