I - 17
Chapter 1
Overview
Pin Description
Table 1-3-8
Pin Function Summary (7/7)
Name
No.
I/O
Other Function
Function
Description
80LQFP
84QFP
C1
C2
4
5
4
5
Capacitor connection
pins for LCD voltage
booster
Capacitor connection pins for LCD voltage booster
VLCIN2
VLCIN3
2
3
2
3
Reference power
supply pins for LCD
voltage booster
Reference power supply pins for LCD voltage
booster *1
VLC1
VLC2
VLC3
1
2
3
1
2
3
VLCIN2
VLCIN3
Input pins for LCD
power supply
Supply for LCD power.
Applied voltage should be 5.5 V
≥ VLC1 ≥ VLC2 ≥ VLC3
≥ 0V. *2
COM0
COM1
COM2
COM3
77
78
79
80
81
82
83
84
output
P30
P31
P32
P33
Output pins for LCD
common
These pins output the common signal with the required
timing to the LCD display.
Connect to the common pins of LCD display panel.
When the LCD display panel is turned off, VSS is output.
*3
SEG0
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
output
P87
P86
P85
P84
P83
P82
P81
P80
P77
P76
P75
P74
P73
P72
P71
P70
P67
P66
P65
P64
P63
P62
P61
P60
P47, KEY7, SDO0
P46, KEY6, SDO1
P45, KEY5, SDO2
P44, KEY4, SDO3
P43, KEY3, SDO4
P42, KEY2, SDO5
P41, KEY1, SDO6
P40, KEY0, SDO7
LCD segment output
pins
These pins are LCD segment driver pins.
When not used segment output, these pins can be used
as normal I/O pins by setting the LCD control register
(LCCTR1, 2).
SEG0 to 15 can be switched in 4-bits units to I/O ports.
SEG16 to 23 can be switched in 2-bits units to I/O
ports.
SEG24 to 31 can be switched in 1-bit units to I/O ports.
MMOD
12
14
Input
Memory mode switch
input pin
This pin sets the memory expansion mode. Be sure to
setthe inputlow.
NATRST
-
10
Input
Auto reset enable pin
This pin enable the auto reset function.
When Input low, auto reset function is not active. When
Input High, auto reset function is active.
*1
When the reference voltage is input to VLCIN2 pin, 3/2 times voltage of the reference voltage is
output to VLC1 pin, 1/2 times voltage of the reference voltage is output to VLC3 pin.
When the reference voltage is input to VLCIN3 pin, 3 times voltage of the reference voltage is
output to VLC1 pin, twice voltage of the reference voltage is output to VLC2 pin.
*2
The voltage input to VLC2 pin can be devided to VLC2 pin and VLC3 pin, with the internal voltage
divider resistors.
*3
COM0 to 3 can be switched to normal ports 1 bit unit with the LCDMD2 register.