Datasheet

The two tables below relates the alternate functions of Port A to the overriding signals shown in the figure
in section Alternate Port Functions on page 96.
Table 18-4 Overriding Signals for Alternate Functions in PA7:PA4
Signal
Name
PA7/AD7 PA6/AD6 PA5/AD5 PA4/AD4
PUOE SRE SRE SRE SRE
PUOV ~(WR | ADA
(1)
) •
PORTA7 • PUD
~(WR | ADA
(1)
) •
PORTA6 • PUD
~(WR | ADA
(1)
) •
PORTA5 • PUD
~(WR | ADA
(1)
) •
PORTA4 • PUD
DDOE SRE SRE SRE SRE
DDOV WR | ADA WR | ADA WR | ADA WR | ADA
PVOE SRE SRE SRE SRE
PVOV A7 • ADA | D7
OUTPUT • WR
A6 • ADA | D6
OUTPUT • WR
A5 • ADA | D5
OUTPUT • WR
A4 • ADA | D4
OUTPUT • WR
DIEOE 0 0 0 0
DIEOV 0 0 0 0
DI D7 INPUT D6 INPUT D5 INPUT D4 INPUT
AIO – – – –
Note: 1. ADA is short for ADdress Active and represents the time when address is output. See External
Memory Interface for details.
Table 18-5 Overriding Signals for Alternate Functions in PA3:PA0
Signal
Name
PA3/AD3 PA2/AD2 PA1/AD1 PA0/AD0
PUOE SRE SRE SRE SRE
PUOV ~(WR | ADA
(1)
) •
PORTA3 • PUD
~(WR | ADA
(1)
) •
PORTA2 • PUD
~(WR | ADA
(1)
) •
PORTA1 • PUD
~(WR | ADA
(1)
) •
PORTA0 • PUD
DDOE SRE SRE SRE SRE
DDOV WR | ADA WR | ADA WR | ADA WR | ADA
PVOE SRE SRE SRE SRE
PVOV A3 • ADA | D3
OUTPUT • WR
A2 • ADA | D2
OUTPUT • WR
A1 • ADA | D1
OUTPUT • WR
A0 • ADA | D0
OUTPUT • WR
DIEOE 0 0 0 0
DIEOV 0 0 0 0
DI D3 INPUT D2 INPUT D1 INPUT D0 INPUT
AIO – – – –
Related Links
External Memory Interface on page 34
Atmel ATmega64A [DATASHEET]
Atmel-8160E-ATmega64A_Datasheet_Complete-09/2015
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