3 - 6
Name
No.
I/O
Other
Function
Function
Descr iption
KEY0
KEY1
KEY2
KEY3
KEY4
KEY5
KEY6
KEY7
42
43
44
45
46
47
48
49
Input
P40
P41
P42
P43
P44
P45
P46
P47
Key interrupt input pins
Input pins for interrupt based on OR condition of pin
inputs.
Key input pin for 2 bits can be selected individually by
the key interrupt control register (P4IMD).
When not used for KEY input, these pins can be used
as normal I/O pins.
V
LC1
V
LC2
V
LC3
7
6
5
LCD power supply
These pins supply power to the LCDs.
V
DD
is normally devided by resistors to supply this
voltage.
COM0
COM1
COM2
COM3
1
2
3
4
Output
LCD common outputs
These pins output a common signal with the required
timing to the LCD display. Also, they may be connected
to the common pins on the LCD panel.
LED0
LED1
LED2
LED3
LED4
50
51
52
53
54
Output
P50, NWE
P51, NRE
P52, NCS
P53, A16, SEG27
P54, A17, SEG26
LED (large current)
output
LED driving pins.
SEG27
SEG26
SEG25
SEG24
SEG23
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
Output
P53, A16, LED3
P54, A17, LED4
P60, A0
P61, A1
P62, A2
P63, A3
P64, A4
P65, A5
P66, A6
P67, A7
P70, A8, SDO0
P71, A9, SDO1
P72, A10, SDO2
P73, A11, SDO3
P74, A12, SDO4
P75, A13, SDO5
P76, A14, SDO6
P77, A15, SDO7
P87, D7
P86, D6
P85, D5
P84, D4
P83, D3
P82, D2
P81, D1
P80, D0
LCD segment output
Connect to segment pins on the LCD panel. These pins
are allocated to PORT53, 54, 60 to 67, 70 to 77, 80 to
87. When segments are not used, these pins can be
used as normal I/O pins. At reset, all pins are set to the
input mode.
PIN DESCRIPTIONS OF IC
MCU MN101C39C_399
