參數(shù)資料
型號: UPD17228
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): 27/84頁
文件大?。?/td> 393K
代理商: UPD17228
μ
PD17225, 17226, 17227, 17228
27
Data Sheet U12643EJ2V0DS00
3.7
Switching Bit I/O
The I/O which can be set in the input or output mode in bit units is called a bit I/O. P0E is a bit I/O port, which can be
set in the input or output mode in bit units by the register file shown below. When the mode is changed from input to output,
the P0E output latch contents are output to the port lines, as soon as the mode has been changed.
3
2
1
0
P0EBIO3
P0EBIO2
P0EBIO1
P0EBIO0
Address:
RF : 27H
P0EBIO0
On reset:
0H
R/W:
R/W
0
1
Sets P0E
0
Input/Output Mode
Sets P0E
0
in input mode
Sets P0E
0
in output mode
P0EBIO1
0
1
P0EBIO2
0
1
P0EBIO3
0
1
Sets P0E
1
Input/Output Mode
Sets P0E
1
in input mode
Sets P0E
1
in output mode
Sets P0E
2
Input/Output Mode
Sets P0E
2
in input mode
Sets P0E
2
in output mode
Sets P0E
3
Input/Output Mode
Sets P0E
3
in input mode
Sets P0E
3
in output mode
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