M38860E3A-XXXGP View Datasheet(PDF) -

MITSUBISHI MICROCOMPUTERS

3886 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Table 8 Function description of control I/O pins at bus interface function selected

Pin

P47/SRDY1

/S1

P50/A0

P51/INT20

/S0

P52/INT30

/R

P53/INT40

/W

P42/INT0

/OBF00

P43/INT1

/OBF01

P46/SCLK1

/OBF10

Name

S1

A0

S0

R

W

OBF00

OBF01

OBF10

OBF00

output

enable bit

OBF01

output

enable bit

–

–

–

–

–

–

–

–

–

–

1

0

0

1

0

0

OBF10

output

enable bit

–

–

–

–

–

0

0

1

Input

/Output

Input

Input

Input

Input

Output

Output

Output

Output

Functions

Chip select input

This is used for selecting the data bus buffer and is

selected at “L” level.

Address input

This is used for selecting DBBSTS and DBBOUT

when the host CPU is read.

This is used for distinguishing command from data

when writing to the host CPU.

Chip select input

This is used for selecting the data bus buffer and is

selected at “L” level.

This is a timing signal for reading data from the

data bus buffer to the host CPU.

This is a timing signal for writing data to the data

bus buffer by the host CPU.

Status output signal

OBF00 signal is output.

Status output signal

OBF01 signal is output.

Status output signal

OBF10 signal is output.

39

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