參數(shù)資料
型號(hào)： M37640M4T
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述： 單芯片8位CMOS微機(jī)
文件頁(yè)數(shù)： 9/48頁(yè)
文件大小： 563K
代理商： M37640M4T
MITSUBISHI MICROCOMPUTERS
7630 Group
9
MITSUBISHI
ELECTRIC
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
I/O PORTS
The 7630 group has 35 programmable I/O pins and one input pin
arranged in five I/O ports (ports P0 to P4). The I/O ports are con-
trolled by the corresponding port registers and port direction regis-
ters; each I/O pin can be controlled separately.
When data is read from a port configured as an output port, the port
latch’s contents are read instead of the port level. A port configured
as an input port becomes floating and its level can be read. Data
written to this port will affect the port latch only; the port remains
floating.
Refer to Structure of port- and port direction registers, Structure of
port I/Os (1) and Structure of port I/Os (2).
Fig. 8
Structure of port- and port direction registers
Port Pi
j
direction control bit (j = 0 to 7)
0 :
Port configured as input
1 :
Port configured as output
Note : The direction control bits corresponding to P1
, P1
, P3
, P3
and
P3
are not used (“0” when read, do not write “1”). Port direction re-
gisters are undefined when read (write only).
7
0
Port Pi direction register (i = 0 to 4) (address 0009
16
+ 2 · i)
PiD
Port Pi
j
control bit (j = 0 to 7)
0 :
“L” level
1 :
“H” level
Note : The control bits corresponding to P1
0
, P3
5
, P3
6
and P3
7
are not used
(“0” when read, do not write “1”).
7
0
Port Pi register (i = 0 to 4) (address 0008
16
+ 2 · i)
Pi
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