ATMEGA644PV-20AU Atmel, ATMEGA644PV-20AU Datasheet - Page 86
![IC MCU AVR 64K FLASH 44-TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA644PV-20AU
Manufacturer Part Number
ATMEGA644PV-20AU
Description
IC MCU AVR 64K FLASH 44-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644PV-20AU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
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
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Manufacturer
Quantity
Price
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8011O–AVR–07/10
• 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 Bus Clock Line.
PCINT16, Pin Change Interrupt source 16: The PC0 pin can serve as an external interrupt
source.
Table 11-10
shown in
Table 11-10. Overriding Signals for Alternate Functions in PC7:PC4
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Figure 11-5 on page
PC7/TOSC2/
PCINT23
AS2 • EXCLK
0
AS2 • EXCLK
0
0
0
AS2 • EXCLK +
PCINT23 • PCIE2
AS2
PCINT23 INPUT
T/C2 OSC OUTPUT
and
Table 11-11
78.
relate the alternate functions of Port C to the overriding signals
PC6/TOSC1/
PCINT22
AS2
0
AS2
0
0
0
AS2 +
PCINT22 • PCIE2
EXCLK + AS2
PCINT22 INPUT
T/C2 OSC
INPUT
ATmega164P/324P/644P
PC5/TDI/
PCINT21
JTAGEN
1
JTAGEN
0
0
0
JTAGEN +
PCINT21 • PCIE2
JTAGEN
PCINT21 INPUT
TDI INPUT
PC4/TDO/
PCINT20
JTAGEN
1
JTAGEN
SHIFT_IR +
SHIFT_DR
JTAGEN
TDO
JTAGEN +
PCINT20 • PCIE2
JTAGEN
PCINT20 INPUT
–
86
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