Z8 Encore! XP® 4K Series
Product Specification
11
Table 3. Signal Descriptions (Continued)
Signal Mnemonic
I/O
Description
AV
I
I
I
Analog Power Supply.
Digital Ground.
Analog Ground.
DD
V
SS
AV
SS
Note: The AV and AV signals are available only in 28-pin packages with ADC. They are replaced by
DD
SS
PB6 and PB7 on 28-pin packages without ADC.
Pin Characteristics
Table 4 provides detailed information about the characteristics for each pin available on
the Z8 Encore! XP® 4K Series 20- and 28-pin devices. Data in Table 4 is sorted alphabeti-
cally by the pin symbol mnemonic.
Table 5 provides detailed information about the characteristics for each pin available on
the Z8 Encore! XP® 4K Series 8-pin devices,
All six I/O pins on the 8-pin packages are 5V-tolerant (unless the pull-up devices are
enabled). The column in Table 4 below describes 5V-tolerance for the 20 and 28-pin pack-
ages only.
Note:
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
AVDD
AVSS
DBG
N/A
N/A
I/O
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes
Yes
N/A
N/A
Yes
N/A
N/A
Yes
Yes
N/A
N/A
NA
No
N/A
N/A
I
I
Yes
PA[7:0]
I/O
Programmable
Pull-up
Yes,
Programmable
PA[7:2]
unless
pullups
enabled
PB[7:0]
PC[7:0]
I/O
I/O
I
I
N/A
N/A
Yes
Yes
Programmable
Pull-up
Yes
Yes
Yes,
Programmable
PB[7:6]
unless
pullups
enabled
Programmable
Pull-up
Yes,
Programmable
PC[7:3]
unless
pullups
enabled
PS022815-0206
Pin Description
ZILOG [ ZILOG, INC. ]
