參數(shù)資料
型號(hào): UPD753304P
廠商: NEC Corp.
元件分類: 4位微控制器
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
中文描述: 4位單片機(jī)的小型通用紅外遙控器
文件頁數(shù): 9/56頁
文件大小: 374K
代理商: UPD753304P
9
μ
PD753304
3.2 Non-Port Pins
Dual-
Function Pin
I/O Circuit
Type
Note 1
Pin Name
Input/output
Function
After Reset
PCL
Output
P30
Input
Note 2
E
BUZ
P31
INT1
Input
P103
F -A
S0-S19
Output
High-
impedance
G-B
S20-S23
Output
P83-P80
Input
H
COM0-COM3
Output
High-
impedance
G-B
CL1
CL2
RESET
Input
B -A
IC
V
DD
V
SS
Notes 1.
denotes Schmitt trigger input.
Input/output mode after reset can be specified by mask option. For details, refer to
Table 3-1
.
2.
Clock output
Arbitrary frequency output (for buzzers or system
clock trimming)
Edge detected vectored interrupt
input (detected edge is selectable)
Segment signal output
Segment signal output
Common signal output
Main system clock oscillation resistor (R)
connection pin. No external clock can be input.
System reset input (low level active). On-chip
pull-up resistor specifiable (mask option)
Internally connected. Connect directly to V
DD
.
Positive power supply
Ground potential
Asynchro-
nous
Input with
pull-up
resistor
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