Intel 386 Use P3CFG bit 7 to connect the COMCLK pin to the package pin.

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL

11-20

Use P3CFG bit 7 to connect the COMCLK pin to the package pin.

Port 3 Configuration

P3CFG

(read/write)

Expanded Addr:

ISA Addr:

Reset State:

F824H

—

00H

7 0

PM7 PM6 PM5 PM4 PM3 PM2 PM1 PM0

Bit

Number Bit

Mnemonic Function

7 PM7 Pin Mode:

0 = Selects P3.7 at the package pin.

1 = Selects COMCLK at the package pin.

6 PM6 Pin Mode:

0 = Selects P3.6 at the package pin.

1 = Selects PWRDOWN at the package pin.

5 PM5 Pin Mode:

0 = Selects P3.5 at the package pin.

1 = Connects master IR7 to the pa ckage pin (INT3).

4 PM4 Pin Mode:

0 = Selects P3.4 at the package pin.

1 = Connects master IR6 to the pa ckage pin (INT2).

3 PM3 Pin Mode:

0 = Selects P3.3 at the package pin.

1 = Connects master IR5 to the pa ckage pin (INT1).

2 PM2 Pin Mode:

0 = Selects P3.2 at the package pin.

1 = Connects master IR1 to the pa ckage pin (INT0).

1 PM1 Pin Mode:

See Table 5-1 on page 5-8 for all the PM1 configuration options.

0 PM0 Pin Mode:

See Table 5-1 on page 5-8 for all the PM0 configuration options.