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@ EXPLANATION
OF IC's:
m@ UPD1643G
C-7ET 051-6001-0
Terminal Connection
SEGs37
60
ae 16
SEGse
SEG
1s
SEGs¢
SEG 14
SEG«o
SEGis
SEG
aoe 12
SEG«2
il
SEG4s
sas
SEG
9
SEG4s
SEGs/KSs
SEG4e
SEG7/KS7
SEG?
SEGs/KS 5
SEGas
SEGs/KSs
SEG49/LED1
SEG«4/KS4
SEG 5s0/LED2
SEGs/KSs
SEGs1/LEDs
SEG2/KSe2
SEG 52/LED«
SEG1/KS1
SEG 53 /LEDs
COMs
SEG s4/LED«
COMs
SEG 55 / LED 7
COMz
SEG se/LEDs (80
COM1
Block Diagram
a
ras
—_
N
qa
ge g
= = 24
S$
o
3S 2 8
wm
wm
CxA
wW
>)
WY
48
;:
8
,;
OB]
LED
||Commor
OF
é
4
—oLCD J LED
Level Shifer (56)
xeyel | —-oSYNC
Key
i
4
oo
aea
Selector
aac
laced
men |
Read
DATA—
Address
6
56-bit Shift Register
b—b
ommand
KEY
Keyl
:
8 | Decoder
Counter
Key4
KEY
REQ
|
Vop
Vss Vico
Vici Vice
Vics
Terminal Description
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
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.
Q
S
>
o
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.
1
el oa
12
OSC
IN
13
OSC
OUT
re [sme
17
18
19
Pin for input/output
of sync
signal.
Internal
logic power
pin.
Vico
LCD
driver
power
pin.
Dot
matrix
LCD
drive
power.
Vic3
Earth
pin for
LCD
drive.
COM1
2
Pins for LCD
common
outputs.
COM4
on
<<
RE
SEG1/KS1
| Pins commonly
used for the LCD segment
2
outputs
and
the
key
source
outputs
for key
SEG8/KSB | scanning.
Pins
for LCD
segment
outputs.
Pins
switchable
between
LCD segment outputs
and
LED
outputs.
Switching
is based
on
the
LCD/LED
pin.
wm LA3161
051-0272-00
Block Diagram
© OUTPUT
Regulated
Voltage
Circuit
0 OUTPUT
ARB4171R CR705R
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