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參數(shù)資料
| 型號： | LM9830VJDX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | LM9830 36-Bit Color Document Scanner |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP100 |
| 封裝： | PLASTIC, TQFP-100 |
| 文件頁數(shù)： | 11/45頁 |
| 文件大?。?/td> | 566K |
| 代理商： | LM9830VJDX |
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Pin Descriptions
CCD Driver Signals
1
Digital Output. CCD/CIS clock signal, phase
1.
2
Digital Output. CCD clock signal, phase 2.
RS
Digital Output. Reset pulse for the CCD.
CP1
Digital Output. Clamp pulse for the CCD.
CP2
Digital Output. Clamp pulse for the CCD.
TR1, TR2
Digital Outputs. Transfer pulses for the
CCD(CIS).
Analog I/O
OS
R
, OS
G
,
OS
B
Analog Inputs. These inputs (for Red, Green,
and Blue) should be tied to the sensor’s out-
put signal through DC blocking capacitors.
V
REF LO FORCE,
V
REF LO SENSE
Analog Output/Input. Connect V
to
V
and bypass to AGND with a 0.05μF
monolithic capacitor.
V
REF MID FORCE,
V
REF MID SENSE
Analog Output/Input. Connect V
REF MID OUT
to V
REF MID IN
and bypass to AGND with a
0.05μF monolithic capacitor.
V
REF HI FORCE,
V
REF HI SENSE
Analog Output/Input. Connect V
REF HI OUT
to
V
REF HI IN
and bypass to AGND with a 0.05μF
monolithic capacitor.
V
BANDGAP
Analog Output. Bypass to AGND with a
0.05μF monolithic capacitor.
General Digital I/O
CRYSTAL IN
Digital Input. This is the 50MHz (typical) mas-
ter system clock.
CRYSTAL OUT
Digital Output. Used with CRYSTAL IN and an
external crystal to form a crystal oscillator.
CLK_SEL
Digital Input. Should be tied to DGND for
operation with an external crystal. To use an
external TTL or CMOS clock source, tie
CLK_SEL to V
and drive the clock into the
CRYSTAL OUT pin.
PC I/O
D0 (LSB) -D7
(MSB)
Digital Inputs/Outputs. This is the 8 bit data
path between the LM9830 and the host com-
puter.
STROBE
Digital Input. WR signal in μP Mode.
AUTOFEED
Digital Input. RD signal in μP Mode.
SELECTIN
Digital Input. ALE signal in μP Mode.
INIT
Digital Input. CS signal in μP Mode.
ACK
Digital Output.
BUSY
Digital Output.
PE
Digital Output.
SELECT
Digital Output.
ERROR
Digital Output.
Printer Passthrough
TRISTATE
Digital
passthrough mode, high when the LM9830 is
active. Low when no power is applied to the
LM9830.
Output.
Low
when
in
printer
LATCH
Digital
passthrough mode, low when the LM9830 is
active. Tri-state when no power is applied to
the LM9830.
Output.
High
when
in
printer
Stepper Motor I/O
A, B, A, B
Digital Outputs. Pulses to stepper motor.
SENSE
A
,
SENSE
B
SENSE
GND
Analog Inputs. Current sensing for PWM
winding current control.
Analog Input. Ground sense input for PWM
winding current control.
Scanner Support I/O
PSense #1,
PSense #2
Digital Inputs. Programmable, used for sens-
ing paper, front panel switches, etc.
Misc I/O #1,
Misc I/O #2
Digital Inputs/Outputs. Programmable, used
for front panel switches, status LEDs, etc.
LAMP
R
,
LAMP
G
, LAMP
B
Digital Outputs. Used to control R, G, and B
LEDs of single output CIS, as well as bright-
ness of CCFL.
External RAM I/O
DB0 (LSB) -
DB7 (MSB)
Digital Inputs/Outputs. This is the 8 bit data
path between the external RAM and the
LM9830.
A0-A17
Digital Outputs. Address pins for up to 256k
bytes external RAM.
RD
Digital Output. Read signal to external RAM.
WR
Digital Output. Write signal to external RAM.
Communication Mode
CMODE
Digital Input. Tie to DGND to operate in paral-
lel port mode, or to V
D I/O
to operate in micro-
processor compatible mode.
Test
TEST
Analog Output. This pin can be used to view
the Sample Signal, Sample Reference, and
Clamp Signals.
Analog Power Supplies
V
A
This is the positive supply pin for the analog
supply. It should be connected to a voltage
source of +5V and bypassed to AGND with a
0.1μF monolithic capacitor in parallel with a
10μF tantalum capacitor.
AGND
This is the ground return for the analog sup-
ply.
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