ATMEGA644P-A15MZ Atmel, ATMEGA644P-A15MZ Datasheet - Page 85

• Manufacturer Part Number: ATMEGA644P-A15MZ
• Description: MCU AVR 64KB FLASH 16MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644P-A15MZ

• Package / Case: 44-VQFN Exposed Pad
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 32
• Eeprom Size: 2K x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Program Memory Size: 64KB (64K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7674F–AVR–09/09
• TMS/PCINT19 – Port C, Bit 3
TMS, JTAG Test Mode Select.
PCINT19, Pin Change Interrupt source 19: The PC3 pin can serve as an external interrupt
source.
• TCK/PCINT18 – Port C, Bit 2
TCK, JTAG Test Clock.
PCINT18, Pin Change Interrupt source 18: The PC2 pin can serve as an external interrupt
source.
• SDA/PCINT17 – Port C, Bit 1
SDA, 2-wire Serial Bus Data Input/Output Line.
PCINT17, Pin Change Interrupt source 17: The PC1 pin can serve as an external interrupt
source.
• SCL/PCINT16 – Port C, Bit 0
SCL, 2-wire Serial Busk Clock Line.
PCINT23, Pin Change Interrupt source 23: The PC0 pin can serve as an external interrupt
source.
Table 12-10
shown in
Table 12-10. Overriding Signals for Alternate Functions in PC7:PC4
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Figure 12-5 on page
PC7/TOSC2/
PCINT23
AS2 • EXCLK
0
AS2 • EXCLK
0
0
0
AS2 • EXCLK +
PCINT23 • PCIE2
0
PCINT23 INPUT
T/C2 OSC OUTPUT
and
Table 12-11
77.
relate the alternate functions of Port C to the overriding signals
PC6/TOSC1/
PCINT22
AS2
0
AS2
0
0
0
AS2
EXCLK
PCINT22 INPUT
T/C2 OSC
INPUT
ATmega164P/324P/644P
PC5/TDI/
PCINT21
JTAGEN
1
JTAGEN
0
0
0
JTAGEN
0
PCINT21 INPUT
TDI INPUT
PC4/TDO/
PCINT20
JTAGEN
1
JTAGEN
SHIFT_IR +
SHIFT_DR
JTAGEN
TDO
JTAGEN
0
PCINT20 INPUT
–
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