參數(shù)資料
型號: UPD75312GFA
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): 9/62頁
文件大小: 577K
代理商: UPD75312GFA
μ
PD75312(A), 75316(A)
9
3.
PIN FUNCTIONS
3.1
PORT PINS (1/2)
Input/
Output
Circuit
TYPE
P00
P01
P02
P03
P10
P11
P12
P13
P20
P21
P22
P23
P30
P31
P32
P33
P40-43
P50-53
Pin Name
Input/Output
Function
8-Bit I/O
When Reset
Also Served
As
INT4
SCK
SO/SB0
SI/SB1
INT0
INT1
INT2
TI0
PTO0
PCL
BUZ
LCDCL
SYNC
4-bit input port (PORT0)
Pull-up resistors can be specified in 3-bit
units for the P01 to P03 pins by software.
With noise elimination function
4-bit input port (PORT1)
Internal pull-up resistors can be
specified in 4-bit units by software.
4-bit input/output port (PORT2)
Internal pull-up resistors can be
specified in 4-bit units by software.
Programmable 4-bit input/output port
(PORT3)
This port can be specified for input/
output in bit units.
Internal pull-up resistors can be
specified in 4-bit units by software.
N-ch open-drain 4-bit input/output port
(PORT4)
Internal pull-up resistors can be
specified in bit units. (mask option)
Withstand voltage is 10 V in the open-
drain mode.
N-ch open-drain 4-bit input/output port
(PORT5)
Internal pull-up resistors can be
specified in bit units. (mask option)
Withstand voltage is 10 V in the open-
drain mode.
Input
Input
Input
Input
High level
(with internal
pull-up
resistor) or
high imped-
ance
B
B -C
E-B
E-B
M
M
×
×
×
×
*: Circles indicate Schmitt trigger inputs.
Input
Input/
Output
Input/
Output
Input/
Output
Input
Input/
Output
Input/
Output
Input/
Output
Input/
Output
G
G
F -A
M -C
F -B
High level
(with internal
pull-up
resistor) or
high imped-
ance
*
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