參數(shù)資料
型號(hào)： LM9830
廠商： National Semiconductor Corporation
英文描述： LM9830 36-Bit Color Document Scanner
中文描述： LM9830 36位彩色文件掃描儀
文件頁(yè)數(shù)： 18/45頁(yè)
文件大?。?/td> 566K
代理商： LM9830
18
http://www.national.com
ILLUMINATION SETTINGS
29
Illumination Mode
Controls the function of the 3 LAMP outputs,
LAMP
R
, LAMP
G
, and LAMP
B
Mode 0 is the Off/Reset state.
Mode 1 is typically used for CCFL lamps.
Mode 2 is for color scanning with tri-color
LEDs.
Mode 3 is for grayscale scanning with tri-
color LEDs.
0 0
LAMP
R
= LAMP
G
= LAMP
B
= 0V
(Power-On/Reset Default)
Illumination Mode 1 - LAMP
R
and LAMP
B
turn on
every line, with their on and off points controlled by
the Pixel Counter settings. LAMP
G
Output is
continuous PWM pulse stream. (Figure 28)
LAMP
R
and/or LAMP
B
may be set to stay on or off at
all times by setting the LAMP Off or LAMP On settings
(registers 2C-37) greater than the Line End value
(registers 20 and 21).
Illumination Mode 2 - LAMP
R
, LAMP
G
, LAMP
B
turn
on sequentially at the line rate, with their on and off
points controlled by Pixel Counter settings. (Figure
29)
Illumination Mode 3 - LAMP
R
, LAMP
G
, LAMP
B
turn
on every line, with their on and off points controlled by
the Pixel Counter settings. (Figures 30 and 31)
LAMP
G
output is a PWM pulse stream. Duty cycle is
n/4095. Clock for counter is CRYSTAL IN, giving max
output frequency of 12.2kHz for f
CRYSTAL IN
= 50MHz.
n n n n n n n pixels (1 - 16384)
This selects the pixel count at which the LAMP
R
output goes high (if programmed)
n n n n n n n pixels (1 - 16384)
This selects the pixel count at which the LAMP
R
output goes low (if programmed)
n n n n n n n pixels (1 - 16384)
This selects the pixel count at which the LAMP
G
output goes high (if programmed)
n n n n n n n pixels (1 - 16384)
This selects the pixel count at which the LAMP
G
output goes low (if programmed)
n n n n n n n pixels (1 - 16384)
This selects the pixel count at which the LAMP
B
output goes high (if programmed)
n n n n n n n pixels (1 - 16384)
This selects the pixel count at which the LAMP
B
output goes low (if programmed)
0 1
1 0
1 1
2A
LAMP
G
PWM - MSB
(Illumination Mode 1)
LAMP
G
PWM - LSB
(Illumination Mode 1)
LAMP
R
On - MSB
n n n n
2B
2C
n n n n n n n n
2D
LAMP
R
On - LSB
n n n n n n n n
2E
LAMP
R
Off - MSB
2F
LAMP
R
Off - LSB
n n n n n n n n
30
LAMP
G
On - MSB
31
LAMP
G
On - LSB
n n n n n n n n
32
LAMP
G
Off - MSB
33
LAMP
G
Off - LSB
n n n n n n n n
34
LAMP
B
On - MSB
35
LAMP
B
On - LSB
n n n n n n n n
36
LAMP
B
Off - MSB
37
LAMP
B
Off - LSB
n n n n n n n n
STATIC OFFSET AND GAIN SETTINGS FOR ANALOG FRONT END
38
Static Offset (Red)
0 n n n n n Offset = +n*9.3mV, n = 0 to 31
1 n n n n n Offset = -n*9.3mV, n = 0 to 31
0 n n n n n Offset = +n*9.3mV, n = 0 to 31
1 n n n n n Offset = -n*9.3mV, n = 0 to 31
0 n n n n n Offset = +n*9.3mV, n = 0 to 31
1 n n n n n Offset = -n*9.3mV, n = 0 to 31
0 n n n n n Gain = 0.93 + 0.067*n (V/V), n = 0 to 31
1 n n n n n Gain = 3(0.93 + 0.067*n) (V/V), n = 0 to 31
0 n n n n n Gain = 0.93 + 0.067*n (V/V), n = 0 to 31
1 n n n n n Gain = 3(0.93 + 0.067*n) (V/V), n = 0 to 31
0 n n n n n Gain = 0.93 + 0.067*n (V/V), n = 0 to 31
1 n n n n n Gain = 3(0.93 + 0.067*n) (V/V), n = 0 to 31
39
Static Offset (Green)
3A
Static Offset (Blue)
3B
Static Gain (Red)
3C
Static Gain (Green)
3D
Static Gain (Blue)
Address
Function
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
Value
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