ATmega48 datasheet(72/340 Pages) ATMEL

72 / 340 page

7530H–AVR–02/09

ATmega48/88/168 Automotive

OC1B, Output Compare Match output: The PB2 pin can serve as an external output for the

Timer/Counter1 Compare Match B. The PB2 pin has to be configured as an output (DDB2 set

(one)) to serve this function. The OC1B pin is also the output pin for the PWM mode timer

function.

PCINT2: Pin Change Interrupt source 2. The PB2 pin can serve as an external interrupt source.

• OC1A/PCINT1 – Port B, Bit 1

OC1A, Output Compare Match output: The PB1 pin can serve as an external output for the

Timer/Counter1 Compare Match A. The PB1 pin has to be configured as an output (DDB1 set

(one)) to serve this function. The OC1A pin is also the output pin for the PWM mode timer

function.

PCINT1: Pin Change Interrupt source 1. The PB1 pin can serve as an external interrupt source.

• ICP1/CLKO/PCINT0 – Port B, Bit 0

ICP1, Input Capture Pin: The PB0 pin can act as an Input Capture Pin for Timer/Counter1.

CLKO, Divided System Clock: The divided system clock can be output on the PB0 pin. The

divided system clock will be output if the CKOUT Fuse is programmed, regardless of the

PORTB0 and DDB0 settings. It will also be output during reset.

PCINT0: Pin Change Interrupt source 0. The PB0 pin can serve as an external interrupt source.

Table 10-4 and Table 10-5 relate the alternate functions of Port B to the overriding signals

shown in Figure 10-5 on page 68. SPI MSTR INPUT and SPI SLAVE OUTPUT constitute the

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

ATmega48 Datasheet(PDF) 72 Page - ATMEL Corporation