Z8 Encore! XP® 4K Series
Product Specification
12
Table 4. Pin Characteristics (20- and 28-pin Devices)
Active Low
or
Internal Pull- Schmitt
up Trigger Open Drain
Symbol
Reset
Tristate
5V
Mnemonic Direction Direction Active High Output or Pull-down Input
Output
Tolerance
RESET/
PD0
I/O
I/O
Low (in
Yes (PD0 programmable
Yes
programmable
for PD0; always
on for RESET
Yes,
(defaultsto Reset mode) only)
RESET)
for PD0;
always on for
RESET
unless
pullups
enabled
VDD
VSS
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
PB6 and PB7 are available only in those devices without ADC.
Note:
)
Table 5. Pin Characteristics (8-Pin Devices)
Active Low
or
Internal Pull- Schmitt
Symbol
Reset
Tristate
up
Trigger
Input
Open Drain
Output
5V
Tolerance
Mnemonic Direction Direction Active High Output or Pull-down
PA0/DBG
I/O
I (but can
change
during
N/A
Yes
Programmable
Pull-up
Yes
Yes,
Yes,
Programmable unless
pull-ups
reset if
enabled
key
sequence
detected)
PA1
I/O
I/O
I/O
I
N/A
Yes
Yes
Yes
Programmable
Pull-up
Yes
Yes
Yes
Yes,
Yes,
Programmable unless
pull-ups
enabled
RESET/
PA2
I/O
(defaults
to
Low (in
Reset
mode)
Programmable
for PA2;
always on for
RESET
programmable
Yes,
for PA2; always unless
on for RESET pull-ups
enabled
RESET)
PA[5:3]
I
N/A
Programmable
Pull-up
Yes,
Yes,
Programmable unless
pull-ups
enabled
VDD
VSS
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
PS022815-0206
Pin Description
ZILOG [ ZILOG, INC. ]
