MEGA128CAN Datasheet, PDF (77/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

AT90CAN128
Table 39 and Table 40 relates the alternate functions of Port D to the overriding signals
shown in Figure 34 on page 67.
Table 39. Overriding Signals for Alternate Functions PD7..PD4
Signal Name PD7/T0
PD6/T1/RXCAN
PD5/XCK1/TXCAN
PUOE
0
RXCANEN
TXCANEN +
PUOV
0
PORTD6 • PUD
0
DDOE
0
RXCANEN
TXCANEN
DDOV
0
0
1
PVOE
0
0
TXCANEN + UMSEL1
PVOV
0
0
(XCK1 OUTPUT •
UMSEL1 • TXCANEN)
+ (TXCAN • TXCANEN)
PTOE
0
0
0
DIEOE
0
0
0
DIEOV
0
0
0
DI
T0 INPUT T1 INPUT/RXCAN XCK1 INPUT
AIO
–
–
–
PD4/ICP1
0
0
0
0
0
0
0
0
0
ICP1 INPUT
–
Table 40. Overriding Signals for Alternate Functions in PD3..PD0⁽¹⁾
Signal Name PD3/INT3/TXD1 PD2/INT2/RXD1
PD1/INT1/SDA PD0/INT0/SCL
PUOE
TXEN1
RXEN1
TWEN
TWEN
PUOV
0
PORTD2 • PUD
PORTD1 • PUD PORTD0 • PUD
DDOE
TXEN1
RXEN1
0
0
DDOV
1
0
0
0
PVOE
TXEN1
0
TWEN
TWEN
PVOV
TXD1
0
SDA_OUT
SCL_OUT
PTOE
0
0
0
0
DIEOE
INT3 ENABLE INT2 ENABLE
INT1 ENABLE INT0 ENABLE
DIEOV
INT3 ENABLE INT2 ENABLE
INT1 ENABLE INT0 ENABLE
DI
INT3 INPUT
INT2 INPUT/RXD1 INT1 INPUT
INT0 INPUT
AIO
–
–
SDA INPUT
SCL INPUT
Note:
1. When enabled, the Two-wire Serial Interface enables Slew-Rate controls on the out-
put pins PD0 and PD1. This is not shown in this table. In addition, spike filters are
connected between the AIO outputs shown in the port figure and the digital logic of
the TWI module.
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4250E–CAN–12/04