ATmega48 datasheet(73/340 Pages) ATMEL

73 / 340 page

7530H–AVR–02/09

ATmega48/88/168 Automotive

Notes:

1. INTRC means that one of the internal RC Oscillators are selected (by the CKSEL fuses),

EXTCK means that external clock is selected (by the CKSEL fuses).

Table 10-4.

Overriding Signals for Alternate Functions in PB7..PB4

Signal

Name

PB7/XTAL2/

TOSC2/PCINT7(1)

PB6/XTAL1/

TOSC1/PCINT6(1)

PB5/SCK/

PCINT5

PB4/MISO/

PCINT4

PUOE

INTRC • EXTCK+

AS2

INTRC + AS2

SPE • MSTR

PUOV

PORTB5 • PUD

PORTB4 • PUD

DDOE

INTRC • EXTCK+

AS2

INTRC + AS2

SPE • MSTR

DDOV

PVOE

SPE • MSTR

PVOV

SCK OUTPUT

SPI SLAVE

OUTPUT

DIEOE

INTRC • EXTCK +

AS2 + PCINT7 •

PCIE0

INTRC + AS2 +

PCINT6 • PCIE0

PCINT5 • PCIE0

PCINT4 • PCIE0

DIEOV

(INTRC + EXTCK) •

AS2

INTRC • AS2

PCINT7 INPUT

PCINT6 INPUT

PCINT5 INPUT

SCK INPUT

PCINT4 INPUT

SPI MSTR INPUT

AIO

Oscillator Output

Oscillator/Clock

Input

––

Table 10-5.

Overriding Signals for Alternate Functions in PB3..PB0

Signal

Name

PB3/MOSI/

OC2/PCINT3

PB2/SS/

OC1B/PCINT2

PB1/OC1A/

PCINT1

PB0/ICP1/

PCINT0

PUOE

SPE • MSTR

PUOV

PORTB3 • PUD

PORTB2 • PUD

DDOE

SPE • MSTR

DDOV

PVOE

SPE • MSTR +

OC2A ENABLE

OC1B ENABLE

OC1A ENABLE

PVOV

SPI MSTR OUTPUT

+ OC2A

OC1B

OC1A

DIEOE

PCINT3 • PCIE0

PCINT2 • PCIE0

PCINT1 • PCIE0

PCINT0 • PCIE0

DIEOV

111

PCINT3 INPUT

SPI SLAVE INPUT

PCINT2 INPUT

SPI SS

PCINT1 INPUT

PCINT0 INPUT

ICP1 INPUT

AIO

–––

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