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MFC2000 데이터시트(PDF) 206 Page - List of Unclassifed Manufacturers

부품명 MFC2000
상세설명  Multifunctional Peripheral Controller 2000
PDF  426 Pages
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MFC2000 데이터시트(HTML) 206 Page - List of Unclassifed Manufacturers

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MFC2000 Multifunctional Peripheral Controller 2000
Hardware Description
8-2
Conexant
100723A
Table 8-1. Untitled Table
Name
Description
adclk
Clock for ADC circuit
The maximum frequency of this clock is 5 MHz. This clock is
guaranteed to be low while “sample” is high.
clamp
Clock for clamping circuit
The maximum frequency of this clock is 5 MHz.
gain[3:0]
Selector for gain adjustment on PGA circuit
offset[5:0]
Selector for offset adjustment on DAC circuit
sample
Clock for sampling circuit
The maximum frequency of this clock is 5 MHz. The minimum
(high) pulse width is 50 ns.
adcout[11:0]
Digital data from ADC circuit
TADCREF
Analog signal as a reference voltage for TADC
Table 8-2. Untitled Table
Name
Description
ADCREFN
An internally generated reference voltage
ADCREFP
An internally generated reference voltage
ADGA
Ground return from analog circuits
ADGD
Ground return from digital circuits
ADVA
+3.3V power supply for analog circuits
ADVC
An internally generated reference voltage
ADVD
+3.3V power supply for digital circuits
SCIN
Analog input for scanner signal
8.1.2
Offset Adjustment
This offset adjustment contains DAC which takes digital input to configure the DAC and analog subtraction to
subtract the incoming scanner signal with the analog signal from the DAC. This adjustment is used to
remove/reduce the dark level offset on the scanner signal. The adjustment on DAC value is described below:
Table 8-3. Offset Adjustment on DAC
Parameter
Min
Typ
Max
Units
offset[5:0]
000000
-0.1
V
11111
1.9
V



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