Z8F1680SH020SG Datasheet, PDF (76/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
51
Table 18. Port Alternate Function Mapping, 28-Pin Parts^1,2
Port
Pin Mnemonic
Alternate Function Description
Alternate Function
Set Register AFS1
Port A PA0 T0IN/T0OUT
Timer 0 Input/Timer 0 Output Complement AFS1[0]: 0
Reserved
AFS1[0]: 1
PA1 T0OUT
Timer 0 Output
AFS1[1]: 0
Reserved
AFS1[1]: 1
PA2 DE0
UART 0 Driver Enable
AFS1[2]: 0
Reserved
AFS1[2]: 1
PA3 CTS0
UART 0 Clear to Send
AFS1[3]: 0
Reserved
AFS1[3]: 1
PA4 RXD0/IRRX0
UART 0/IrDA 0 Receive Data
AFS1[4]: 0
Reserved
AFS1[4]: 1
PA5 TXD0/IRTX0
UART 0/IrDA 0 Transmit Data
AFS1[5]: 0
Reserved
AFS1[5]: 1
PA6 T1IN/T1OUT
SCL
Timer 1 Input/Timer 1 Output Complement AFS1[6]: 0
I²C Serial Clock
AFS1[6]: 1
PA7 T1OUT
SDA
Timer 1 Output
I²C Serial Data
AFS1[7]: 0
AFS1[7]: 1
Notes:
1. Because there are at most two choices of alternate functions for some pins in Ports A and B, the Alternate Func-
tion 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 and Port E pin, the Alternate Function Set registers
are not implemented for Ports D and E. Enabling the alternate function selections automatically enables the
associated alternate function, as described in the Port A–E Alternate Function Subregisters section on page 61.
PS025015-1212
PRELIMINARY
General-Purpose Input/Output