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7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
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.
tute the MISO signal, while MOSI is divided into SPI MSTR OUTPUT and SPI SLAVE INPUT.
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 13-4.
Overriding Signals for Alternate Functions in PB7..PB4
Signal
Name
PB7/XTAL2/
PB6/XTAL1/
PB5/SCK/
PCINT5
PB4/MISO/
PCINT4
PUOE
INTRC EXTCK+
AS2
INTRC + AS2
SPE MSTR
PUOV
0
PORTB5 PUD
PORTB4 PUD
DDOE
INTRC EXTCK+
AS2
INTRC + AS2
SPE MSTR
DDOV
0000
PVOE
0
SPE MSTR
PVOV
0
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
11
DI
PCINT7 INPUT
PCINT6 INPUT
PCINT5 INPUT
SCK INPUT
PCINT4 INPUT
SPI MSTR INPUT
AIO
Oscillator Output
Oscillator/Clock
Input
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