Z8F0113 datasheet(63/245 Pages) ZILOG

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PS024315-1011

P R E L I M I N A R Y

GPIO Control Register Definitions

Z8 Encore! XP® F0823 Series

Product Specification

Port A–C Alternate Function Set 1 Subregisters

The Port A–C Alternate Function Set1 Subregister (Table 28) is accessed through the Port

A–C Control Register by writing 07H to the Port A–C Address Register. The Alternate

Function Set 1 subregisters selects the alternate function available at a port pin. Alternate

Functions selected by setting or clearing bits of this register are defined in “GPIO Alter-

nate Functions” on page 34

Alternate function selection on port pins must also be enabled as described in the Port A–

C Alternate Function Subregisters section on page 43.

Table 28. Port A–C Alternate Function Set 1 Subregisters (PAFS1x)

Bit

Field

PAFS17

PAFS16

PAFS15

PAFS14

PAFS13

PAFS12

PAFS11

PAFS10

RESET

00H (all ports of 20/28 pin devices); 04H (Port A of 8-pin device)

R/W

R/WR/W

R/WR/WR/WR/WR/WR/W

Address

If 07H in Port A–C Address Register, accessible through the Port A–C Control Register

Bit

Description

[7:0]



PAFS1x

Port Alternate Function Set to 1

0 = Port Alternate Function selected as defined in Table 15 (see the GPIO Alternate Functions

section on page 34).

1 = Port Alternate Function selected as defined in Table 15 (see the GPIO Alternate Functions

section on page 34).

Note: x indicates the specific GPIO port pin number (7–0).

Note:

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