ZUSBOPTSC01ZAC datasheet(69/402 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

Interrupt Port Select Register

The Interrupt Port Select Register, shown in Table 25, is used to select which Port A pins

are used as interrupts.

Port B Alternate Function 1 Subregisters

The Port B Alternate Function Subregisters, shown in Table 26, is accessed through the

Port B Control Register by writing 08H to the Port B Address Register. The Port B Alter-

nate Function subregister selects the alternate functions for the selected pins. Refer to the

GPIO Alternate Functions section on page 36 to determine the alternate function associ-

ated with each port pin.

Do not enable alternate function for GPIO port pins which do not have an associated al-

ternate function. Failure to follow this guideline may result in unpredictable operation.

Table 25. Interrupt Port Select Sub-Register (IRQPS)

BITS

FIELD

Reserved

PA73SEL PA62SEL PA51SEL PA40SEL

RESET

000

R/W

ADDR

If 09H in Port A Address Register, accessible through the Port A and Port C Control Register

Bit

Position

Value

(H)

Description

[3:0]

PAxxSEL

Interrupt Port Select x

An interrupt request is generated on PAx, where x indicates (0 through 3)

An interrupt request is generated on PAx, where x indicates (4 through 7)

Caution:

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