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參數資料
| 型號： | W6662CF |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 消費家電 |
| 英文描述： | CCD(Correlated Double Sampler)/CIS(Contact Image Sensors) Analog Front End Signal Processor.(耦合采樣器／接觸圖象傳感器模擬前端信號處理器) |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 10 X 10 MM, 2 MM HEIGHT, PLASTIC, QFP-48 |
| 文件頁數： | 5/19頁 |
| 文件大小： | 272K |
| 代理商： | W6662CF |
Preliminary W6662CF
Publication Release Date: December 1998
- 5 -
Revision A1
If input capacitor value is specified as C
IN
, the following is the equation to calculate how many lines
are required before the capacitor settles to the desired accuracy after power is up:
(R
ON
+ R
CCDS
)
×
C
IN
L
N
= ln (V
OFS
/V
CLPTolerance
)
PIX
N
×
t
CLP
where
L
N
is line number.
PIX
N
is the total pixel number in one line.
C
IN
is the input capacitor value, 0.01
μ
F is suggestion value.
V
OFS
is the internal offset voltage to be clampped on the input terminal of the input capacitor.
Fig. 6-1 Equivalent Circuit of Clampping.
R
ON
= 5K
R
CCDS
C
IN
Input to MUX
V
OFS
W6662
CCD Device
I
BIAS
on when
CDSCK1= high
0.01uF
Fig. 6-2 CCD Input Clamp Waveform.
Output
signal
from CCD
Input
signal
to W6662
V
C
(Pixel n)
(Pixel n+1)
t
CLP
V
CLPTolerance
V
C
V
DATAn
V
DATAn
V
DATAn+1
V
DATAn+1
V
OFS
6.2 MUX and Channel Select
The analog input signal may be three channels or single channel and is specified in configuration
register. Three channel input or single channel input are described as follows:
The three channel input is used for red, green and blue analog signal input, selected by SEL1 and
SEL0 signals. The channel select signals SEL1 and SEL0 may be 01, 10, 11 and listed as follows:
SEL1 = 0, SEL0 = 1 is red channel input selected, red channel of gain register and offset register also
selected.
SEL1 = 1, SEL0 = 0 is green channel input selected, green channel of gain register and offset register
also selected.
SEL1 = 1, SEL0 = 1 is blue channel input selected, blue channel of gain register and offset register
also selected.
SEL1 = 0, SEL0 = 0 is reserved.
The one channel input is used for black and white CCD/CIS sensor or multiplexed color CCD/CIS
sensor output. Any channel input of red, green or blue can be used, other un-used analog input must
tight to V
SS
in S & H mode. The channel select signals SEL1 and SEL0 is used to select offset
register and gain register only and may be 01, 10, 11, described as follows:
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