Z8F082ASH020SC datasheet(49/244 Pages) ZILOG

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PS024705-0405

P R E L I M I N A R Y

General-Purpose I/O

Z8 Encore! XP® F08xA Series

Product Specification

General-Purpose I/O

Overview

The Z8 Encore! XP® F08xA Series products support a maximum of 25 port pins (Ports A–

D) for general-purpose input/output (GPIO) operations. Each port contains control and

data registers. The GPIO control registers determine data direction, open-drain, output

drive current, programmable pull-ups, STOP Mode Recovery functionality, and alternate

pin functions. Each port pin is individually programmable. In addition, the Port C pins are

capable of direct LED drive at programmable drive strengths.

GPIO Port Availability By Device

Table 13 lists the port pins available with each device and package type.

Architecture

Figure 6 illustrates a simplified block diagram of a GPIO port pin. In this figure, the abil-

ity to accommodate alternate functions and variable port current drive strength is not illus-

trated.

Table 13. Port Availability by Device and Package Type

Devices

Package

10-Bit ADC

Port A

Port B

Port C

Port D

Total I/O

Z8F082APH, Z8F082AHH

20-pin

Yes

[7:0]

[3:0]

[0]

Z8F081APH, Z8F081AHH

20-pin

[7:0]

[3:0]

[0]

Z8F082APJ, Z8F082ASJ

28-pin

Yes

[7:0]

[5:0]

[7:0]

[0]

Z8F081APJ, Z8F081ASJ

28-pin

[7:0]

[0]

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