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參數(shù)資料
| 型號： | UPD75402AA |
| 廠商： | NEC Corp. |
| 英文描述： | 4 BIT SINGLE-CHIP MICROCOMPUTER |
| 中文描述： | 4位單片機 |
| 文件頁數(shù)： | 7/48頁 |
| 文件大小： | 515K |
| 代理商： | UPD75402AA |
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7
μ
PD75402A(A)
3. PIN FUNCTIONS
3.1 PORT PINS
Remarks 1.
The
μ
PD75402A(A) cannot perform 8-bit I/O with two ports as a pair.
2.
See Chapter 8 for each pin status during resetting.
Pin
P00
P01
P02
P03
P10
P12
P20
P21
P22
P23
P30 - P33
P50 - P53
P60 - P63
I/O
Input
I/O
I/O
Input
Input
I/O
I/O
I/O
I/O
Dual-
function pin
–
SCK
SO/SB0
SI
INT0
INT2
–
–
PCL
–
–
–
–
Function
4-bit input port (port 0)
P01 to P03 allow the connection of built-in pull-up resistors to be
specified in units of three bits by software.
2-bit input port (port 1)
P10 connects with the built-in noise eliminator using a sampling clock.
P12 connects with the built-in noise eliminator using an analog delay.
P12 allows the connection of built-in pull-up resistor to be specified by
software.
4-bit I/O port (port 2)
Allow I/O specification in units of four bits.
Allow the connection of built-in pull-up resistors to be specified in
units of four bits by software.
Programmable 4-bit I/O port (port 3)
Allow I/O specification bit by bit.
Allow the connection of built-in pull-up resistors to be specified in
units of four bits by software.
Can directly drive LED.
4-bit N-ch open-drain I/O port (port 5)
Allow I/O specification in units of four bits.
Allow the connection of built-in pull-up resistors to be specified bit by
bit by mask option.
Can directly drive LED.
4-bit I/O port (port 6)
Allow I/O specification in units of four bits.
Allow the connection of built-in pull-up resistors to be specified in
units of four bits by software.
Can directly drive LED.
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