參數(shù)資料
型號(hào): UPD753304W
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): 8/56頁
文件大小: 374K
代理商: UPD753304W
8
μ
PD753304
3. PIN FUNCTIONS
3.1 Port Pins
Dual-
Function Pin
8-Bit
I/O
I/O Circuit
Type
Note 1
Pin Name
Input/output
Function
After Reset
P30
Input/output
PCL
X
Input
Note 2
E
P31
BUZ
P32
P33
P80
Input/output
S23
X
Input
H
P81
S22
P82
S21
P83
S20
P100
Input/output
X
E-B
P101
P102
P103
INT1
F -A
Notes 1.
denotes Schmitt trigger input.
2.
Input/output mode after reset can be specified by mask option. For details, refer to
Table 3-1
.
Table 3-1. State after Reset by Mask Option of Port 3
Pin Names
State after Reset
Mask Option <1>
Mask Option <2>
Mask Option <3>
P30/PCL
Input
Low-level output
Low-level output
P31/BUZ
P32
P33
High-level output
Programmable 4-bit input/output port
(PORT3)
Input/output specifiable bit-wise
Input/output mode after reset specifiable
(mask option)
Note 2
4-bit input/output port (PORT8)
Programmable 4-bit input/output port
(PORT10)
Input/output specifiable bit-wise
Connection of on-chip pull-up resistor
specifiable in 4-bit units by software
Input with
pull-up
resistor
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