Z8 Encore! XP® 4K Series
Product Specification
44
drains if set to 1.
0 = The source current is enabled for any output mode (unless overridden by the alternate
function). (Push-pull output)
1 = The source current for the associated pin is disabled (open-drain mode).
Port A–D High Drive Enable Sub-Registers
The Port A–D High Drive Enable sub-register (Table 23) is accessed through the Port
A–D Control register by writing 04Hto the Port A–D Address register. Setting the bits in
the Port A–D High Drive Enable sub-registers to 1 configures the specified port pins for
high current output drive operation. The Port A–D High Drive Enable sub-register affects
the pins directly and, as a result, alternate functions are also affected.
Table 23. Port A–D High Drive Enable Sub-Registers (PxHDE)
BITS
7
6
5
4
3
2
1
0
PHDE7
PHDE6
PHDE5
PHDE4
PHDE3
PHDE2
PHDE1
PHDE0
FIELD
RESET
R/W
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
If 04H in Port A–D Address Register, accessible through the Port A–D Control Register
ADDR
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–D STOP Mode Recovery Source Enable Sub-Registers
The Port A–D STOP Mode Recovery Source Enable sub-register (Table 24) is accessed
through the Port A–D Control register by writing 05Hto the Port A–D Address register.
Setting the bits in the Port A–D 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.
Table 24. Port A–D STOP Mode Recovery Source Enable Sub-Registers (PxSMRE)
BITS
7
6
5
4
3
2
1
0
PSMRE7 PSMRE6 PSMRE5 PSMRE4 PSMRE3 PSMRE2 PSMRE1 PSMRE0
FIELD
RESET
R/W
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
If 05H in Port A–D Address Register, accessible through the Port A–D Control Register
ADDR
PSMRE[7:0]—Port STOP Mode Recovery Source Enabled
0 = The Port pin is not configured as a STOP Mode Recovery source. Transitions on this
PS022815-0206
General-Purpose I/O
ZILOG [ ZILOG, INC. ]
