lm9831 National Semiconductor Corporation, lm9831 Datasheet - Page 20

• Manufacturer Part Number: lm9831
• Description: 42-bit Color, 1200dpi Usb Image Scanner
• Manufacturer: National Semiconductor Corporation

Address
5F-7F
TEST MODE SETTINGS
5C
5D
5E
ADC Output Code - MSB
ADC Output Code - LSB
ADC Test Mode
Pixel Processing Input Select
16 bit Counter Increment Select
(16 bit counter starts at 0, increments every
datapixel)
MCLK edge for AFE (Set this bit to 0)
CDS Signal
Reserved
Function
D
7
n n n n n n n n Used to force the input to the HDPI Divider to a known
n n n n n n n n
0
1
0 0 0 0 0 0 0 0 Write 00 to these registers
D
0
1
6
D
0 0
0 1
1 0
1 1
5
D
4
20
D
3
0 0
0 1
1 0
1 1
D
2
D
0 0 Normal Operation
0 1 Bypass AFE, Normal ADC Operation
1 0
1 1
1
D
0
value for digital tests
Bypass AFE, bypass ADC digital correction,
output uncorrected ADC MSB
Bypass AFE, bypass ADC digital correction,
output uncorrected ADC LSB
Normal Operation - ADC Output
Registers 5C and 5D
16 bit counter, reset at the start of every scan
16 bit counter, reset at the start of every line
Increments by 1
Increments by 4
Increments by 16
N/A
Rising
Falling
Normal Operation
CDS signal is output on LAMP
Value
B
pin
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