參數(shù)資料
型號: μPD789186
廠商: NEC Corp.
英文描述: 8 Bit Single Chip Microcontrollers(8 位單片微控制器)
中文描述: 8位單片機(jī)微控制器(8位單片微控制器)
文件頁數(shù): 43/146頁
文件大?。?/td> 630K
代理商: ΜPD789186
Preliminary Product Information
43
μ
PD789186, 789187, 789196, 789197
(3) Port mode register 3 (PM3)
PM3 is used to specify port 3 input/output on a bit-by-bit basis.
When the P32/INTP2/TO90 pin is used for timer output or the P33/INTP3/TO82/BZO90 pin is used for buzzer
output
PM3 is manipulated using a 1-bit or 8-bit memory manipulation instruction.
A RESET input loads FFH into PM3.
Note
, set 0 in the output latch of PM32 and P32, and in the output latch of the PM33 and P33.
Figure 6-14. Format of Port Mode Register 3
PM3n
P3n pin I/O mode (n = 2 or 3)
Output mode (output buffer ON)
Input mode (output buffer OFF)
0
1
1
1
1
1
PM33
PM32
PM31
PM30
PM3
Symbol
Address
When reset
R/W
FF23H
FFH
R/W
6
7
5
4
3
2
1
0
Note
Never output the TO82 and BZO90 signals at the same time.
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