Z8F1680SH020SG Datasheet, PDF (75/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
50
Table 17. Port Alternate Function Mapping, 20-Pin Parts^1,2 (Continued)
Port
Pin Mnemonic
Alternate Function Description
Alternate Function
Set Register AFS1
Port B PB0 Reserved
AFS1[0]: 0
ANA0/AMPOUT ADC Analog Input/LPO Output
AFS1[0]: 1
PB1 Reserved
AFS1[1]: 0
ANA1/AMPINN ADC Analog Input/LPO Input (N)
AFS1[1]: 1
PB2 Reserved
AFS1[2]: 0
ANA2/AMPINP ADC Analog Input/LPO Input (P)
AFS1[2]: 1
PB3 CLKIN
External Clock Input
AFS1[3]: 0
ANA3
ADC Analog Input
AFS1[3]: 1
Port C PC0 Reserved
AFS1[0]: 0
ANA4/C0INP/LED ADC or Comparator 0 Input (P), or LED AFS1[0]: 1
drive
PC1 Reserved
AFS1[1]: 0
ANA5/C0INN/LED ADC or Comparator 0 Input (N), or LED AFS1[1]: 1
drive
PC2 Reserved
AFS1[2]: 0
VREF/ANA6/LED Voltage Reference or ADC Analog Input AFS1[2]: 1
or LED Drive
PC3 C0OUT
Comparator 0 Output
AFS1[3]: 0
LED
LED drive
AFS1[3]: 1
Port D PD0 RESET
External Reset
N/A
Notes:
1. Because there are at most two choices of alternate functions for some pins in Port A, the Alternate Function Set
Register (AFS2) is implemented but not used to select the function. The alternate function selection must also
be enabled, as described in the Port A–E Alternate Function Subregisters section on page 61.
2. Because there is only one alternate function for each Port D pin, the Alternate Function Set registers are not
implemented for Port D. Enabling the alternate function selections automatically enables the associated alter-
nate function, as described in the Port A–E Alternate Function Subregisters section on page 61.
PS025015-1212
PRELIMINARY
General-Purpose Input/Output