Z8F6421PM020SC Datasheet, PDF (79/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
59
Port A-H High Drive Enable Sub-Registers
The Port A–H High Drive Enable sub-register (Table 19) is accessed through the Port A–
H Control register by writing 04H to the Port A-H Address register. Setting the bits in the
Port A–H High Drive Enable sub-registers to 1 configures the specified port pins for high
current output drive operation. The Port A–H High Drive Enable sub-register affects the
pins directly and, as a result, alternate functions are also affected.
Table 19. Port A–H High Drive Enable Sub-Registers
BITS
FIELD
RESET
R/W
ADDR
7
PHDE7
6
PHDE6
5
PHDE5
4
PHDE4
3
PHDE3
2
PHDE2
1
PHDE1
0
PHDE0
0
R/W
If 04H in Port A-H Address Register, accessible through Port A-H Control Register
PHDE[7:0]—Port High Drive Enabled
0 = The Port pin is configured for standard output current drive.
1 = The Port pin is configured for high output current drive.
Port A-H STOP Mode Recovery Source Enable Sub-Registers
The Port A–H STOP Mode Recovery Source Enable sub-register (Table 20) is accessed
through the Port A–H Control register by writing 05H to the Port A–H Address register.
Setting the bits in the Port A–H STOP Mode Recovery Source Enable sub-registers to 1
configures the specified Port pins as a STOP Mode Recovery source. During STOP Mode,
any logic transition on a Port pin enabled as a STOP Mode Recovery source initiates
STOP Mode Recovery.
PS019915-1005
General-Purpose I/O