ATMEGA644P-20AUR Atmel, ATMEGA644P-20AUR Datasheet - Page 24

• Manufacturer Part Number: ATMEGA644P-20AUR
• Description: MCU AVR 64K FLASH 20MHZ 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644P-20AUR

• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.5
9.6
9.7
24
Rev. 8011K- 09/08
Rev. 8011J- 09/08
Rev. 8011I- 05/08
ATmega164P/324P/644P
1.
2.
3.
4.
5.
2.
6.
1.
2.
6.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
2.
6.
Updated
tion” on page 15
Updated V
Updated t
page
Updated typical values for ATmega324P and ATmega644P in the tables of
acteristics” on page
Replaced the package drawing
Added 49-ball VFBGA pinout for ATmega164P/324P in
Added 49-ball VFBGA (49C2) to
Updated ATmega644P
Added 49-ball VFBGA pinout for ATmega164P/324P in
Added 49-ball VFBGA (49C2) to
Updated description in
Updated
Updated Data Memory Map addresses,
Updated description of use of external capacitors in
on page
Updated typo
Updated bit description in
Updated typo in
Updated conditions for V
Updated
Updated conditions for V
teristics” on page
Updated Minimum Reference Voltage in
Characteristics” on page
Updated bit bit field typos in
Added 49-ball VFBGA pinout for ATmega164P/324P in
Added 49-ball VFBGA (49C2) to
332.
35.
”Stack Pointer” on page
”External Clock Drive” on page
”Features” on page
RST
OL
in the table of
in”Alternate Functions of Port C” on page
and t
”Programming via the JTAG Interface” on page
according to the updated 44M1 package drawing.
336.
BOD
326.
”AVCC” on page
”Errata” on page
unites in the table of
OL
INT2
336.
”TWSR – TWI Status Register” on page
in the table of
”DC Characteristics” on page
”Register Summary” on page
in
1,
”44M1” on page 426
Table 27-11
”Pin Configurations” on page 2
”Packaging Information” on page
”Packaging Information” on page
”Packaging Information” on page
14.
Figure 7-2 on page
7.
331.
428.
”DC Characteristics” on page
Table 27-12
(Single Ended channels) in
”System and Reset Characteristics” on
”Low Frequency Crystal Oscillator”
by a rev H update.
(Differential channels) in
”Pinout - VFBGA” on page
”Pinout - VFBGA” on page
”Pinout - VFBGA” on page
86.
326.
414.
21.
and
313.
19.
425.
235.
425.
”Ordering Informa-
326.
”ADC Charac-
8011OS–AVR–07/10
”DC Char-
”ADC
4.
4.
4.