Z8F021ASH020SC datasheet(30/276 Pages) ZILOG

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PS022815-0206

Pin Description

Z8 Encore! XP® 4K Series

Product Specification

Pin Characteristics

Table 4 provides detailed information about the characteristics for each pin available on

the Z8 Encore! XP® 4K Series 20- and 28-pin devices. Data in Table 4 is sorted alphabeti-

cally by the pin symbol mnemonic.

Table 5 provides detailed information about the characteristics for each pin available on

the Z8 Encore! XP® 4K Series 8-pin devices,

All six I/O pins on the 8-pin packages are 5V-tolerant (unless the pull-up devices are

enabled). The column in Table 4 below describes 5V-tolerance for the 20 and 28-pin pack-

ages only.

AVDD

Analog Power Supply.

VSS

Digital Ground.

AVSS

Analog Ground.

Note: The AVDD and AVSS signals are available only in 28-pin packages with ADC. They are replaced by

PB6 and PB7 on 28-pin packages without ADC.

Table 4. Pin Characteristics (20- and 28-pin Devices)

Symbol

Mnemonic Direction

Reset

Direction

Active Low

Active High

Tristate

Output

Internal Pull-

or Pull-down

Schmitt

Trigger

Input

Open Drain

Output

Tolerance

AVDD

N/A

AVSS

N/A

DBG

I/O

N/A

Yes

PA[7:0]

I/O

N/A

Yes

Programmable

Pull-up

Yes

Yes,

Programmable

PA[7:2]

unless

pullups

enabled

PB[7:0]

I/O

N/A

Yes

Programmable

Pull-up

Yes

Yes,

Programmable

PB[7:6]

unless

pullups

enabled

PC[7:0]

I/O

N/A

Yes

Programmable

Pull-up

Yes

Yes,

Programmable

PC[7:3]

unless

pullups

enabled

Table 3. Signal Descriptions (Continued)

Signal Mnemonic

I/O

Description

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