ATMEGA645A-AU Atmel, ATMEGA645A-AU Datasheet - Page 85

• Manufacturer Part Number: ATMEGA645A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA645A-AU

• 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-TQFP
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

13.3.6
8285B–AVR–03/11
Alternate Functions of Port H
ATmega165A/165PA/325A/325PA/3250A/3250PA/6
Table 13-14
shown in
Table 13-15. Overriding Signals for Alternate Functions in PG4:PG3
Port H is only present in ATmega3250A/3250PA/6450A/6450P. The alternate pin configuration
is as follows:
Table 13-16. Port H Pins Alternate Functions
The alternate pin configuration is as follows:
• PCINT23 – Port H, Bit 7
PCINT23, Pin Change Interrupt Source 23: The PH7 pin can serve as an external interrupt
source.
• PCINT22 – Port H, Bit 6
PCINT22, Pin Change Interrupt Source 22: The PH6 pin can serve as an external interrupt
source.
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
DIEOE
DIEOV
DI
AIO
Port Pin
PH7
PH6
PH5
PH4
PH3
PH2
PH1
PH0
Figure 13-5 on page
PG4/T0
0
0
0
1
0
0
–
0
0
T0 INPUT
–
and
Alternate Function
PCINT23(Pin Change Interrupt23)
PCINT22 (Pin Change Interrupt22)
PCINT21(Pin Change Interrupt21)
PCINT20(Pin Change Interrupt20)
PCINT19 (Pin Change Interrupt19)
PCINT18(Pin Change Interrupt18)
PCINT17(Pin Change Interrupt17)
PCINT16(Pin Change Interrupt16)
Table 13-15
relates the alternate functions of Port G to the overriding signals
74.
PG3/T1/
0
0
0
1
0
0
–
0
0
T1 INPUT
–
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