AT90CAN128
Table 37. Overriding Signals for Alternate Functions in PC3..PC0
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
DIEOE
DIEOV
DI
PC3/A11
PC2/A10
PC1/A9
PC0/A8
SRE • (XMM<5)
SRE • (XMM<6)
SRE • (XMM<7)
SRE • (XMM<7)
0
0
0
0
SRE • (XMM<5)
SRE • (XMM<6)
SRE • (XMM<7)
SRE • (XMM<7)
1
1
1
1
SRE • (XMM<5)
SRE • (XMM<6)
SRE • (XMM<7)
SRE • (XMM<7)
A11
0
A10
0
A9
0
A8
0
0
0
0
0
0
0
0
0
–
–
–
–
AIO
–
–
–
–
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
PD7
Alternate Function
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)
ICP1 (Timer/Counter1 Input Capture Trigger)
PD4
PD3
INT3/TXD1 (External Interrupt3 Input or UART1 Transmit Pin)
INT2/RXD1 (External Interrupt2 Input or UART1 Receive Pin)
INT1/SDA (External Interrupt1 Input or TWI Serial DAta)
INT0/SCL (External Interrupt0 Input or TWI Serial CLock)
PD2
PD1
PD0
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.
75
4250E–CAN–12/04
ATMEL [ ATMEL ]
