z8fmc16100 ZiLOG Semiconductor, z8fmc16100 Datasheet - Page 46

• Manufacturer Part Number: z8fmc16100
• Description: Z8 Encore Motor Control Flash Mcus
• Manufacturer: ZiLOG Semiconductor

PS024611-0408
GPIO Alternate Functions
System Clock
Data Bus
Many GPIO port pins can be used as both GPIO and to provide access to on-chip
peripheral functions, like timers and serial communication devices. The Port A-C
Alternate Function subregisters configure these pins for either GPIO or alternate function
operation. When a pin is configured for alternate function, control of the port pin direction
(input/output) is passed from Port A-C Data Direction registers to the alternate function
assigned to this pin. For peripherals with digital input alternate functions (for example, a
Timer input T0IN0), selecting the alternate function is not required.
Table 13
alternate function (AF0 and AF1) subregister settings. Enabling an analog alternate func-
tion automatically disables the digital Schmitt-trigger input for the associated port input.
Data Register
Port Output
D
lists the alternate functions associated with each port pin and the required
System Clock
Q
Peripheral
On-Chip
Port Output Control
Figure 5. GPIO Port Pin Block Diagram
Port Data Direction
Alternate Function
Data Register
Digital Input
Port Input
Q
D
Pull-Up Enable
Analog In/Out
Schmitt Trigger
GND
Product Specification
GPIO Alternate Functions
V
DD
Port
Pin
34