ATMEGA640 datasheet(95/449 Pages) ATMEL

95 / 449 page

ATmega640/1280/1281/2560/2561

2549K–AVR–01/07

Alternate Functions of Port C

The Port C alternate function is as follows:

Table 46 and Table 47 relate the alternate functions of Port C to the overriding signals

shown in Figure 36 on page 89.

Table 44. Overriding Signals for Alternate Functions in PB3:PB0

Signal

Name

PB3/MISO

PB2/MOSI

PB1/SCK

PB0/SS

PUOE

SPE • MSTR

PUOV

PORTB3 • PUD

PORTB2 • PUD

PORTB1 • PUD

PORTB0 • PUD

DDOE

SPE • MSTR

DDOV

PVOE

SPE • MSTR

PVOV

SPI SLAVE OUTPUT

SPI MSTR OUTPUT

SCK OUTPUT

DIEOE

PCINT3 • PCIE0

PCINT2 • PCIE0

PCINT1 •

PCIE0

PCINT0 •

PCIE0

DIEOV

SPI MSTR INPUT

PCINT3 INPUT

SPI SLAVE INPUT

PCINT2 INPUT

SCK INPUT

PCINT1 INPUT

SPI SS

PCINT0 INPUT

AIO

–

Table 45. Port C Pins Alternate Functions

Port Pin

Alternate Function

PC7

A15(External Memory interface address bit 15)

PC6

A14(External Memory interface address bit 14)

PC5

A13(External Memory interface address bit 13)

PC4

A12(External Memory interface address bit 12)

PC3

A11(External Memory interface address bit 11)

PC2

A10(External Memory interface address bit 10)

PC1

A9(External Memory interface address bit 9)

PC0

A8(External Memory interface address bit 8)

ATMEGA640 Datasheet(PDF) 95 Page - ATMEL Corporation

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