参数资料
型号: m789436
厂商: NEC Corp.
元件分类: 8位微控制器
英文描述: 8-Bit Single-Chip Microcontrollers
中文描述: 8位单芯片微控制器
文件页数: 76/144页
文件大小: 1378K
代理商: M789436
User’s Manual U15075EJ1V0UM00
37
CHAPTER 2 PIN FUNCTIONS
2.1 List of Pin Functions
(1)
Port pins (1/2)
Pin Name
I/O
Function
After Reset
Alternate Function
P00 to P03
I/O
Port 0.
4-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, an on-chip pull-up resistor can be
specified by means of pull-up resistor option register 0 (PU0) or
key return mode register 00 (KRM00).
Input
KR0 to KR3
P10 to P13
I/O
Port 1.
4-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, an on-chip pull-up resistor can be
specified by means of pull-up resistor option register 0 (PU0).
Input
P20
P21
BZO90
P22
SS20
P23
SCK20/ASCK20
P24
SO20/TxD20
P25
SI20/RxD20
P26
I/O
Port 2.
7-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, an on-chip pull-up resistor can be
specified by means of pull-up resistor option register B2 (PUB2).
Input
TO90
P30
INTP0/CPT90
P31
INTP1/TO50/
TMI60
P32
INTP2/TO60
P33
I/O
Port 3.
4-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, an on-chip pull-up resistor can be
specified by means of pull-up resistor option register B3 (PUB3).
Input
INTP3/TO61
P50 to P53
I/O
Port 5.
4-bit N-ch open-drain I/O port.
Input/output can be specified in 1-bit units.
For a mask ROM version, an on-chip pull-up resistor can be
specified by the mask option.
Input
P60 to P65
Input
Port 6.
6-bit input port.
Input
ANI0 to ANI5
P70 to P72
I/O
Port 7.
3-bit I/O port.
Input/output can be specified in 1-bit units.
When used as an input port, an on-chip pull-up resistor can be
specified by means of pull-up resistor option register B7 (PUB7).
Input
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