MEGA128CAN Datasheet, PDF (73/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

AT90CAN128
Table 34. Overriding Signals for Alternate Functions in PB3..PB0
Signal Name PB3/MISO
PB2/MOSI
PB1/SCK
PUOE
SPE • MSTR
SPE • MSTR
SPE • MSTR
PUOV
PORTB3 • PUD PORTB2 • PUD PORTB1 • PUD
DDOE
SPE • MSTR
SPE • MSTR
SPE • MSTR
DDOV
0
0
0
PVOE
SPE • MSTR
SPE • MSTR
SPE • MSTR
PVOV
SPI SLAVE
OUTPUT
SPI MASTER
OUTPUT
SCK OUTPUT
PTOE
0
0
0
DIEOE
0
0
0
DIEOV
0
0
0
DI
SPI MASTER
SPI SLAVE
SCK INPUT
INPUT
INPUT • RESET
AIO
–
–
–
PB0/SS
SPE • MSTR
PORTB0 • PUD
SPE • MSTR
0
0
0
0
0
0
SPI SS
–
Alternate Functions of Port C
The Port C has an alternate function as the address high byte for the External Memory
Interface.
The Port C pins with alternate functions are shown in Table 35.
Table 35. Port C Pins Alternate Functions
Port Pin
Alternate Function
PC7
A15/CLKO (External memory interface address 15 or Divided
System Clock)
PC6
A14 (External memory interface address 14)
PC5
A13 (External memory interface address 13)
PC4
A12 (External memory interface address 12)
PC3
A11 (External memory interface address 11)
PC2
A10 (External memory interface address 10)
PC1
A9 (External memory interface address 9)
PC0
A8 (External memory interface address 8)
The alternate pin configuration is as follows:
• A15/CLKO – Port C, Bit 7
A15, External memory interface address 15.
CLKO, Divided System Clock: The divided system clock can be output on the PC7 pin.
The divided system clock will be output if the CKOUT Fuse is programmed, regardless
of the PORTC7 and DDC7 settings. It will also be output during reset.
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