Z8F6421PM020SC Datasheet, PDF (75/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
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Table 13. GPIO Port Registers and Sub-Registers
Port Register Mnemonic Port Register Name
PxADDR
Port A-H Address Register
(Selects sub-registers)
PxCTL
PxIN
PxOUT
Port A-H Control Register
(Provides access to sub-registers)
Port A-H Input Data Register
Port A-H Output Data Register
Port Sub-Register Mnemonic Port Register Name
PxDD
Data Direction
PxAF
PxOC
PxDD
PxSMRE
Alternate Function
Output Control (Open-Drain)
High Drive Enable
STOP Mode Recovery Source Enable
Port A-H Address Registers
The Port A–H Address registers select the GPIO Port functionality accessible through the
Port A–H Control registers. The Port A–H Address and Control registers combine to pro-
vide access to all GPIO Port control (Table 14).
Table 14. Port A-H GPIO Address Registers (PxADDR)
BITS
7
6
5
4
3
2
1
0
FIELD
PADDR[7:0]
RESET
R/W
ADDR
00H
R/W
FD0H, FD4H, FD8H, FDCH, FE0H, FE4H, FE8H, FECH
PS019915-1005
General-Purpose I/O