M37630 View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M37630

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

7630 Group

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).

7

0

Port Pi register (i = 0 to 4) (address 000816 + 2 · i)

Pi

Port Pij control bit (j = 0 to 7)

0 : “L” level

1 : “H” level

Note : The control bits corresponding to P10, P35, P36 and P37 are not used

(“0” when read, do not write “1”).

7

0

Port Pi direction register (i = 0 to 4) (address 000916 + 2 · i)

PiD

Port Pij direction control bit (j = 0 to 7)

0 : Port configured as input

1 : Port configured as output

Note : The direction control bits corresponding to P10, P11, P35, P36 and

P37 are not used (“0” when read, do not write “1”). Port direction re-

gisters are undefined when read (write only).

Fig. 8 Structure of port- and port direction registers

MITSUBISHI

ELECTRIC

9

Share Link: