80
7679H–CAN–08/08
AT90CAN32/64/128
9.3.5 Alternate Functions of Port D
The Port D pins with alternate functions are shown in Table 9-12.
The alternate pin configuration is as follows:
• T0 – 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.
• TXCAN/XCK1 – Port D, Bit 5
Table 9-11. Overriding Signals for Alternate Functions in PC3..PC0
Signal Name PC3/A11 PC2/A10 PC1/A9 PC0/A8
PUOE SRE • (XMM<5) SRE • (XMM<6) SRE • (XMM<7) SRE • (XMM<7)
PUOV0000
DDOE SRE • (XMM<5) SRE • (XMM<6) SRE • (XMM<7) SRE • (XMM<7)
DDOV1111
PVOE SRE • (XMM<5) SRE • (XMM<6) SRE • (XMM<7) SRE • (XMM<7)
PVOV A11 A10 A9 A8
PTOE0000
DIEOE0000
DIEOV0000
DI––––
AIO––––
Table 9-12. 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)
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