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m@ EXPLANATION
OF IC's:
mw UPD1643G C-7ET 051-6001-0
Terminal Connection
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RADON
SECs? (49
ar) SEGus
SEGss
SEG1s
SEGs9
SEG14
SEG«o
SEGis
SEGa1
SEG 12
SEGa2
SEGi1
SEG4s
SEG10
SEGu
SEGe
SEG«s
SEGs/KSs
SEG46
SEG?/KS7
SEG«7
SEGe/KSs
SEGas
SEGs/KSs
SEG40/LED1
SEG«/KS+4
SEGs0/LED2
SEGs/KSs
SEG 51/LEDs
SEG2/KS2
SEG s2/LED4
SEG1/KS1
SEG 53 /LEDs
COM4
SEG s4/LEDe
COMs
SEGss/LED7
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SEG
36 /LED® {g0,
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COM
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Block Diagram
a
36
ga
8 &.,
SS
or
os
&
ne &
a
8
8 8
from
the
significant bit at negative
going
of the
shift clock.
This
pin is open
drain
during
output.
Pin
for input
of strobe
signal.
"L" enables
data input.
Command
is
processed
at the
positive
going.
Pin for switching between
LCD and LED.
"H' makes
SEGn/LEDn
LCD segment outputs
and "L" makes
them LED driver outputs.
Pin for input
of Output
Enable
signal.
"L'
turns
all segments
and all LEDs
off.
Connect
the
resistor
of oscillator
circuit.
Pin for input/output
of sync
signal.
Internal
logic power
pin.
LCD
driver
power
pin.
Dot
matrix
LCD
drive
power.
Earth
pin for
LCD
drive.
Pins
for LCD
common
outputs.
Pins
commonly
used
for the LCD
segment
outputs
and
the
key source
outputs
for key
scanning.
|
Pins
for LCD
segment
outputs.
Pins switchable
between
LCD segment outputs
and
LED outputs.
Switching
is based on the
LCD/LED pin.
4.
—eLCD/LED
—se
'A
m LA3161 051-0272-00
Block Diagram
Key
Counter
Vv
Write
o
Address _
DATA—
ee
DATA
rs ~[eiSrol
[_s6- bit Shift Register |
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INPUT o
'
'© OUTPUT
'ommand
Key Latch
Keyl
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esunter
°/R
Key4
Regulated
KEY
REQ
Voltage
Circuit
INPUT o
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—o OUTPUT
6
Terminal Description
Function
GND
Earth
pin for internal
logic and
LED
outputs.
Pins
for input
of key data
for key scan.
Key request
output
pin.
Goes "H' when
one
of the keys is pressed
(key data "H").
Pin
for input
of data
shift clock.
Reads
data
at positive going
and
outputs
data
at negative
going.
Pin for input/output of data.
Inputs
of commands
and
display
data
and
outputs
key data.
The
data
is input
from
the
significant
bit at
positive going of the shift clock
and
output
ARB4171R CRR705R
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