3 - 7
Name
No.
I/O
Other
Function
Function
D escription
SEG1
SEG0
79
80
Output
LCD segment output
Connect to segment pins on the LCD panel.
MMOD
14
Input
Memory mode switch
input pin
This pin sets the memory expansion mode. Set this pin
always to low.
NWE
NRE
NCS
NDK
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
D0
D1
D2
D3
D4
D5
D6
D7
50
51
52
31
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
53
54
78
77
76
75
74
73
72
71
Output
Output
Output
Input
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
P50, LED0
P51, LED1
P52, LED2
P06, BUZZER
P60, SEG25
P61, SEG24
P62, SEG23
P63, SEG22
P64, SEG21
P65, SEG20
P66, SEG19
P67, SEG18
P70, SDO0, SEG17
P71, SDO1, SEG16
P72, SDO2, SEG15
P73, SDO3, SEG14
P74, SDO4, SEG13
P75, SDO5, SEG12
P76, SDO6, SEG11
P77, SDO7, SEG10
P53, SEG27, LED3
P54, SEG26, LED4
P80, SEG2
P81, SEG3
P82, SEG4
P83, SEG5
P84, SEG6
P85, SEG7
P86, SEG8
P87, SEG9
Write enable pin
(Active low)
Read enable pin,
LED0
(Active low)
Chip select pin
(Active low)
Data acknowledge pin
(Active low)
Address pin
Data pin
Memory control signals for an expanded memory
space outside this LSI.
NWE is a strobe signal output for writing to external
memory.
NRE is a strobe signal output for reading from external
memory.
NCS is a chip select signal output when external
memory is accessed.
NDK is an acknowledge signal that indicates the
external memory access is complete.
A0 to A17 are address signals output to external
memory.
PIN DESCRIPTIONS OF IC
MCU MN101C39C_399
