Datasheet

Table Of Contents
75
7679H–CAN–08/08
AT90CAN32/64/128
Table 9-4 and Table 9-5 relates the alternate functions of Port A to the overriding signals shown
in Figure 9-5 on page 72.
Note: 1. ADA is short for ADdress Active and represents the time when address is output. See “Exter-
nal Memory Interface” on page 27 for details.
Note: 1. ADA is short for ADdress Active and represents the time when address is output. See “Exter-
nal Memory Interface” on page 27 for details.
Table 9-4. Overriding Signals for Alternate Functions in PA7..PA4
Signal Name PA7/AD7 PA6/AD6 PA5/AD5 PA4/AD4
PUOE
SRE
(ADA
(1)
+ WR)
SRE
(ADA
(1)
+ WR)
SRE
(ADA
(1)
+ WR)
SRE
(ADA
(1)
+ WR)
PUOV0000
DDOE SRE SRE SRE SRE
DDOV WR
+ ADA WR + ADA WR + ADA WR + ADA
PVOE SRE SRE SRE SRE
PVOV
A7 ADA
(1)
+ D7
OUTPUT WR
A6 ADA
(1)
+ D6
OUTPUT WR
A5 ADA
(1)
+ D5
OUTPUT WR
A4 ADA
(1)
+ D4
OUTPUT WR
PTOE0000
DIEOE0000
DIEOV0000
DI D7 INPUT D6 INPUT D5 INPUT D4 INPUT
AIO––––
Table 9-5. Overriding Signals for Alternate Functions in PA3..PA0
Signal Name PA3/AD3 PA2/AD2 PA1/AD1 PA0/AD0
PUOE
SRE
(ADA
(1)
+ WR)
SRE
(ADA
(1)
+ WR)
SRE
(ADA
(1)
+ WR)
SRE
(ADA
(1)
+ WR)
PUOV0000
DDOE SRE SRE SRE SRE
DDOV WR
+ ADA WR + ADA WR + ADA WR + ADA
PVOE SRE SRE SRE SRE
PVOV
A3 ADA
(1)
+ D3
OUTPUT WR
A2 ADA
(1)
+ D2
OUTPUT WR
A1 ADA
(1)
+ D1
OUTPUT WR
A0 ADA
(1)
+ D0
OUTPUT WR
PTOE0000
DIEOE0000
DIEOV0000
DI D3 INPUT D2 INPUT D1 INPUT D0 INPUT
AIO––––