ZUSBOPTSC01ZAC datasheet(63/402 Pages) ZILOG

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PS024604-1005

P R E L I M I N A R Y

Port A–C Control Registers

Z8FMC16100 Series Flash MCU

Product Specification

Port A–C Control Registers

The Port A–C Control registers set the GPIO port operation. The value in the correspond-

ing Port A–C Address register determines the control subregisters accessible using the

Port A–C Control registers, shown in Table 17. The Port Control registers provide access

to all subregisters that configure GPIO port operation.

Port A–C Data Direction Subregisters

The Port A–C Data Direction subregisters are accessed through the Port A–C Control reg-

isters by writing 01h to the Port A–C Address registers. See Table 18.

Table 16. Port Control Subregisters by Port Address

Port

Address

Port Control Subregisters

00h

No function; provides some protection against accidental port

reconfiguration.

01h

Data direction.

02h

Alternate Function 0

03h

Output Control (open-drain).

04h

High Drive Enable.

05h

Stop-mode recovery source enable.

06h

Pull-up enable.

07h

Alternate Function 1—ports A and B only.

08h

Interrupt Edge Select - Port A and Port C only

09h

Port Interrupt Select Register - Port A only

0Ah–FFh

No Function

Table 17. Port A–C Control Registers (PxCTL)

BITS

FIELD

PCTL

RESET

00H

R/W

ADDR

FD1H, FD5H, FD9H

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