
HM17CM256
- 10 -
I
PIN DESCRIPTION 1
No.
NAME
V
DD
I/O
FUNCTION
21,22,23,
39,40,41
27,28,29,
58,59,60
67,68,69,
88,89,90
31
supply
Power pin for logic
V
SS
supply
GND pin for logic
V
SSH
supply
High voltage GND pin
V
DDA
supply
This pin is internally connected to V
DD
pin.
This pin is used when the voltage of each input pin is fixed to
V
DD
level.
caution) Do not use to main power pin.
This pin is internally connected to V
SS
pin.
This pin is used when the voltage of each input pin is fixed to
V
SS
level.
caution) Do not use to main power pin.
supply/O
LCD driver supply voltage
LCD driver power supply port when external power supply
is used. When external power is used, voltages should
have following relations.
V
SS
<V
4
<V
3
<V
2
<V
1
<V
LCD
V
LCD
, V
1
~V
4
voltages are generated by voltage booster at
master mode operation under power circuit ON.
When internal power supply is used, capacitors must be
connected between V
LCD
, V
1
~V
4
and V
SS
.
O
Capacitor connection pin for voltage converter
17,18,19,
34,35,36
V
SSA
supply
70,71,115,116
72,73
74,75
76,77
78,79
V
LCD
V
1
V
2
V
3
V
4
91,92
93,94
95,96
97,98
99,100
101,102
103,104
105,106
107,108
109,110
111,112
113,114
82,83
84
85,86,87
C
1
+
C
1
-
C
2
+
C
2
-
C
3
+
C
3
-
C
4
+
C
4
-
C
5
+
C
5
-
C
6
+
C
6
-
V
BA
V
REF
V
EE
O
Capacitor connection pin for voltage converter
O
Capacitor connection pin for voltage converter
O
Capacitor connection pin for voltage converter
O
Capacitor connection pin for voltage converter
O
Capacitor connection pin for voltage converter
O
I
Reference voltage output pin for voltage regulating.
Reference voltage input pin for voltage regulating.
Voltage supply pin for boosted voltage generation.
V
DD
level at normal status.
supply/O
Internal DC/DC converter output pin.
O
Voltage regulator output pin.
I
Reset pin
Reset when RES= “L”
supply
117,118
80,81
24
V
OUT
V
REG
RES