ATmega325P datasheet(73/364 Pages) ATMEL

73 / 364 page

8023F–AVR–07/09

ATmega325P/3250P

Table 13-4 and Table 13-5 relate the alternate functions of Port B to the overriding signals

shown in Figure 13-5 on page 69. SPI MSTR INPUT and SPI SLAVE OUTPUT constitute the

MISO signal, while MOSI is divided into SPI MSTR OUTPUT and SPI SLAVE INPUT.

Table 13-4.

Overriding Signals for Alternate Functions in PB7:PB4

Signal Name

PB7/OC2A/

PCINT15

PB6/OC1B/

PCINT14

PB5/OC1A/

PCINT13

PB4/OC0A/

PCINT12

PUOE

0000

PUOV

0000

DDOE

0000

DDOV

0000

PVOE

OC2A ENABLE

OC1B ENABLE

OC1A ENABLE

OC0A ENABLE

PVOV

OC2A

OC1B

OC1A

OC0A

PTOE

––––

DIEOE

PCINT15 • PCIE1

PCINT14 • PCIE1

PCINT13 • PCIE1

PCINT12 • PCIE1

DIEOV

1111

PCINT15 INPUT

PCINT14 INPUT

PCINT13 INPUT

PCINT12 INPUT

AIO

––––

Table 13-5.

Overriding Signals for Alternate Functions in PB3:PB0

Signal Name

PB3/MISO/

PCINT11

PB2/MOSI/

PCINT10

PB1/SCK/

PCINT9

PB0/SS/

PCINT8

PUOE

SPE • MSTR

PUOV

PORTB3 • PUD

PORTB2 • PUD

PORTB1 • PUD

PORTB0 • PUD

DDOE

SPE • MSTR

DDOV

0000

PVOE

SPE • MSTR

PVOV

SPI SLAVE

OUTPUT

SPI MSTR

OUTPUT

SCK OUTPUT

PTOE

––––

DIEOE

PCINT11 • PCIE1

PCINT10 • PCIE1

PCINT9 • PCIE1

PCINT8 • PCIE1

DIEOV

1111

PCINT11 INPUT

SPI MSTR INPUT

PCINT10 INPUT

SPI SLAVE INPUT

PCINT9 INPUT

SCK INPUT

PCINT8 INPUT

SPI SS

AIO

––––

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