Z8 Encore! XP® F08xA Series
Product Specification
31
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.
Table 13. Port Availability by Device and Package Type
Devices
Package 10-Bit ADC Port A
Port B
[3:0]
[3:0]
[5:0]
[7:0]
Port C Port D Total I/O
Z8F082APH, Z8F082AHH
Z8F081APH, Z8F081AHH
Z8F082APJ, Z8F082ASJ
Z8F081APJ, Z8F081ASJ
20-pin
20-pin
28-pin
28-pin
Yes
No
[7:0]
[7:0]
[7:0]
[7:0]
[3:0]
[3:0]
[7:0]
[7:0]
[0]
[0]
[0]
[0]
17
17
23
25
Yes
No
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.
PS024705-0405
P R E L I M I N A R Y
General-Purpose I/O
ZILOG [ ZILOG, INC. ]
