ATMEGA645P-MU Atmel, ATMEGA645P-MU Datasheet - Page 76

• Manufacturer Part Number: ATMEGA645P-MU
• Description: IC MCU AVR 64K FLASH 64QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA645P-MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

13.3.1
76
ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/645
Alternate Functions of Port B
The Port B pins with alternate functions are shown in
Table 13-3.
The alternate pin configuration is as follows:
• OC2A/PCINT15, Bit 7
OC2, Output Compare Match A output: The PB7 pin can serve as an external output for the
Timer/Counter2 Output Compare A. The pin has to be configured as an output (DDB7 set (one))
to serve this function. The OC2A pin is also the output pin for the PWM mode timer function.
PCINT15, Pin Change Interrupt source 15: The PB7 pin can serve as an external interrupt
source.
• OC1B/PCINT14, Bit 6
OC1B, Output Compare Match B output: The PB6 pin can serve as an external output for the
Timer/Counter1 Output Compare B. The pin has to be configured as an output (DDB6 set (one))
to serve this function. The OC1B pin is also the output pin for the PWM mode timer function.
PCINT14, Pin Change Interrupt Source 14: The PB6 pin can serve as an external interrupt
source.
• OC1A/PCINT13, Bit 5
OC1A, Output Compare Match A output: The PB5 pin can serve as an external output for the
Timer/Counter1 Output Compare A. The pin has to be configured as an output (DDB5 set (one))
to serve this function. The OC1A pin is also the output pin for the PWM mode timer function.
PCINT13, Pin Change Interrupt Source 13: The PB5 pin can serve as an external interrupt
source.
• OC0A/PCINT12, Bit 4
OC0A, Output Compare Match A output: The PB4 pin can serve as an external output for the
Timer/Counter0 Output Compare A. The pin has to be configured as an output (DDB4 set (one))
to serve this function. The OC0A pin is also the output pin for the PWM mode timer function.
PCINT12, Pin Change Interrupt Source 12: The PB4 pin can serve as an external interrupt
source.
Port Pin
PB7
PB6
PB5
PB4
PB3
PB2
PB1
PB0
Alternate Functions
OC2A/PCINT15 (Output Compare and PWM Output A for Timer/Counter2 or Pin Change
Interrupt15).
OC1B/PCINT14 (Output Compare and PWM Output B for Timer/Counter1 or Pin Change
Interrupt14).
OC1A/PCINT13 (Output Compare and PWM Output A for Timer/Counter1 or Pin Change
Interrupt13).
OC0A/PCINT12 (Output Compare and PWM Output A for Timer/Counter0 or Pin Change
Interrupt12).
MISO/PCINT11 (SPI Bus Master Input/Slave Output or Pin Change Interrupt11).
MOSI/PCINT10 (SPI Bus Master Output/Slave Input or Pin Change Interrupt10).
SCK/PCINT9 (SPI Bus Serial Clock or Pin Change Interrupt9).
SS/PCINT8 (SPI Slave Select input or Pin Change Interrupt8).
Port B Pins Alternate Functions
Table
13-3.
8285B–AVR–03/11