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5
Pin
Signal
IN/OUT
Description
(Standby
=
power
off)
No.
name
13
iA8
IN/OUT
Key
input/strobe
signal
,
low during standby and
key-in
pulse is
generated
when low.
14
iA7
IN/OUT
Key input/strobe
signal
,
low during
standby and key-in pulse is
generated
when low.
15
iA6
IN/OUT
Key input/strobe
signal,
low during
standby and key-in pulse is generated when low.
16
iA5
IN/OUT
Key input/strobe
signal,
low during
standby and key-in pulse is generated when low.
17
iA4
IN/OUT
Key
input/strobe
signal,
low during standby and key-in pulse is
generated
when
low.
18
iA3
IN/OUT
Key input/strobe
signal,
low during standby and -key-in pulse is
generated
when
low.
19
iA2
IN/OUT
Key input/strobe signal,
low during standby
and
key-in pulse is
generated
when low.
20
iA1
IN/OUT
Key input/strobe
signal,
low during standby and key-in pulse is
generated
when
low.
21
iB8
IN
ACK
signal that enables the CPU
to read data through
1/0
port (PCU).
22
iB7
IN
Data in
(Din).
Serial
data input from PCU (bit by bit
serial
handshake).
23
iB6
OUT
SEL2
output, P-type open drain.
24
iB5
OUT
SEL
1
output, P-type open
drain.
25
iB4
IN
Slide switch input.
26
iB3
OUT
Key strobe output, low during
standby and key-in pulse is generated when
low.
27
iB2
OUT
Key strobe
output,
low during
standby and key-in pulse is generated when low.
28
iB
1
OUT
Key strobe
output, low
during standby and
key-in pulse
is
generated when
low.
29
VM
IN
LCD
power supply.
30
VA
IN
LCD
power supply.
31
GND
IN
Power
supply.
32
H1
OUT
LCD
backplate
signal,
high
impedance
during standby 'and 4-level pulse during
display.
33
H2
OUT
LCD
backplate
signal,
high impedance
during
standby
and 4-level
pulse during
display.
34
H3
OUT
LCD
backplate
signal,
high impedance during standby
and 4-level
pulse
during
display.
35
H4
OUT
LCD
backplate
signal,
high impedance
during
standby
and
4-level
pulse
during
display.
36
H5
OUT
LCD
backplate
signal,
high impedance
during
standby
and 4-level
pulse during
display.
37
H6
OUT
LCD
backplate
signal, high impedance
during
standby and
4-level
pulse during
display.
38
H7
OUT
LCD
backplate signal,
high impedance
during standby and 4-level pulse during display.
39
H8
OUT
LCD
backplate signal,
high
impedance
during standby
and 4-level pulse during
display.
40
H9
OUT
LCD
backplate signal,
high impedance
during
standby and
4-level
pulse during
display.
41
H10
OUT
LCD
backplate
signal,
high
impedance
during
standby and 4-level pulse during display.
42
H 11
OUT
LCD
backplate
signal,
high
impedance
during
standby and 4-level pulse
during display.
43
H12
OUT
LCD
backplate
signal,
high
impedance
during
standby and 4-level pulse
during display.
44
H13
OUT
LCD
backplate signal, high impedance during
standby
and 4-level
pulse during display.
45
H14
OUT
LCD
backplate
signal,
high impedance during
standby
and
4-level
pulse during display.
46
H15
--
Not used.
(Displ
a y
of this unit
operates
in
1/14
duty.)
47
H16
--
Not
used.
(Display of this unit
operates in 1/14 duty.)
48
Vs
IN
LCD
power
supply,
high during
standby and low when the high level
clock
stops.
49
VD
is
IN
LCD
power supply, high
during standby and low when
the high
level clock stops.
50
Vee
IN
LCD
power supply,
normall
y
low.
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