MEGA128CAN Datasheet, PDF (75/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

AT90CAN128
Table 37. Overriding Signals for Alternate Functions in PC3..PC0
Signal Name PC3/A11
PC2/A10
PC1/A9
PUOE
SRE • (XMM<5) SRE • (XMM<6) SRE • (XMM<7)
PUOV
0
0
0
DDOE
SRE • (XMM<5) SRE • (XMM<6) SRE • (XMM<7)
DDOV
1
1
1
PVOE
SRE • (XMM<5) SRE • (XMM<6) SRE • (XMM<7)
PVOV
A11
A10
A9
PTOE
0
0
0
DIEOE
0
0
0
DIEOV
0
0
0
DI
–
–
–
AIO
–
–
–
PC0/A8
SRE • (XMM<7)
0
SRE • (XMM<7)
1
SRE • (XMM<7)
A8
0
0
0
–
–
Alternate Functions of Port D The Port D pins with alternate functions are shown in Table 38.
Table 38. Port D Pins Alternate Functions
Port Pin Alternate Function
PD7 T0 (Timer/Counter0 Clock Input)
PD6 RXCAN/T1 (CAN Receive Pin or Timer/Counter1 Clock Input)
PD5 TXCAN/XCK1 (CAN Transmit Pin or USART1 External Clock Input/Output)
PD4 ICP1 (Timer/Counter1 Input Capture Trigger)
PD3 INT3/TXD1 (External Interrupt3 Input or UART1 Transmit Pin)
PD2 INT2/RXD1 (External Interrupt2 Input or UART1 Receive Pin)
PD1 INT1/SDA (External Interrupt1 Input or TWI Serial DAta)
PD0 INT0/SCL (External Interrupt0 Input or TWI Serial CLock)
The alternate pin configuration is as follows:
• T0/CLKO – Port D, Bit 7
T0, Timer/Counter0 counter source.
• RXCAN/T1 – Port D, Bit 6
RXCAN, CAN Receive Data (Data input pin for the CAN). When the CAN controller is
enabled this pin is configured as an input regardless of the value of DDD6. When the
CAN forces this pin to be an input, the pull-up can still be controlled by the PORTD6 bit.
T1, Timer/Counter1 counter source.
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4250E–CAN–12/04