z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 82

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

GPIO Alternate Functions
PS022006-0207
System
Clock
Data
Bus
Data Register
Port Output
D
Many GPIO port pins are used for GPIO and to provide access to the on-chip peripheral
functions such as timers, serial communication devices, and external data and address bus.
The Port A–K alternate function registers configure these pins for either GPIO or alternate
function operation. When a pin is configured for alternate function, control of the port pin
direction (I/O) is passed from the Port A–K data direction registers to the alternate function
assigned to this pin.
port pin.
For detailed information on enabling the external interface data signals, see
Interface
the other GPIO functionality including alternate functions cannot be used.
Q
on page 39. When the external interface data signals are enabled for an 8-bit port,
Port Output Control
Port Data Direction
Figure 17. GPIO Port Pin Block Diagram
Table 24
System
Clock
P R E L I M I N A R Y
on page 69 lists the alternate functions associated with each
Data Register
Port Input
Q
D
Pull-up Enable
Schmitt Trigger
GND
VDD
General-Purpose Input/Output
Product Specification
ZNEO
™
External
VDD
Z16F Series
Port
Pin
68