Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller VFQFN 28 (4x4) 8-Bit 20 MHz I/O number 23

6. I/O Multiplexing

Each pin is by default controlled by the PORT as a general purpose I/O and alternatively it can be

assigned to one of the peripheral functions.

The following table describes the peripheral signals multiplexed to the PORT I/O pins.

Table 6-1. PORT Function Multiplexing

(32-pin

32UFBGA)

Pin#

(32-pin

MLF/

TQFP)

Pin#

(28-pin

MLF)

Pin#

(28-pin

PIPD)

Pin#

PAD EXTINT PCINT ADC/A

OSC T/C #0 T/C

USART

C 0 SPI 0

B1 1 1 5 PD3 INT1 PCINT19 OC2B

B2 2 2 6 PD4 PCINT20 T0 XCK0

D1 4 3 7 VCC

C1 3 4 8 GND

D2 6 - - VCC

C2 5 - - GND

E1 7 5 9 PB6 PCINT6 XTAL1/

TOSC1

F1 8 6 10 PB7 PCINT7 XTAL2/

TOSC2

F2 9 7 11 PD5 PCINT21 OC0B T1

E2 10 8 12 PD6 PCINT22 AIN0 OC0A

F3 11 9 13 PD7 PCINT23 AIN1

E3 12 10 14 PB0 PCINT0 CLKO ICP1

F4 13 11 15 PB1 PCINT1 OC1A

E4 14 12 16 PB2 PCINT2 OC1B SS0

F5 15 13 17 PB3 PCINT3 OC2A MOSI0

F6 16 14 18 PB4 PCINT4 MISO0

E6 17 15 19 PB5 PCINT5 SCK0

E5 18 16 20 AVCC

D6 19 - - ADC6 ADC6

D5 20 17 21 AREF

C6 21 18 22 GND

C5 22 - - ADC7 ADC7

B6 23 19 13 PC0 PCINT8 ADC0

A6 24 20 24 PC1 PCINT9 ADC1

A2 25 21 25 PC2 PCINT10 ADC2

B5 26 22 26 PC3 PCINT11 ADC3

A4 27 23 27 PC4 PCINT12 ADC4 SDA0

B4 28 24 28 PC5 PCINT13 ADC5 SCL0

ATmega48PA/88PA/168PA

I/O Multiplexing

Datasheet Complete

DS40002011A-page 22