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ATMEGA644PA-ANR
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P17
4.
Block Diagram
Figure 4-1. Block Diagram
CPU
USART 0
ADC
ADC[7:0]
AREF
RxD0
TxD0
XCK0
I
/O
PORTS
D
A
T
A
B
U
S
GPIOR[2:0]
SRAM
OCD
EXTINT
FLASH
NVM
programming
JT
AG
I
N
/
O
U
T
D
A
T
A
B
U
S
TC 0
(8-bit)
SPI
AC
AIN0
AIN1
ACO
ADCMUX
EEPROM
EEPROMIF
TC 1
(16-bit)
OC1A/B
T1
ICP1
TC 2
(8-bit async)
TWI
SDA
SCL
USART 1
RxD1
TxD1
XCK1
Internal
Reference
W
atchdog
Timer
Power
management
and clock
control
VCC
GND
Clock generation
8MHz
Calib RC
128kHz int
osc
32.768kHz
XOSC
External
clock
Power
Supervision
POR/BOD &
RESET
TOSC2
XT
AL
2
RESET
XT
AL
1
TOSC1
16MHz LP
XOSC
TCK
TMS
TDI
TDO
PCINT[31:0]
INT[2:0]
T0
OC0A
OC0B
MISO
MOSI
SCK
SS
OC2A
OC2B
P
A
[7:0]
PB[7:0]
PC[7:0]
PD[7:0]
Atmel A
Tmega644P
A [DA
T
ASHEET]
Atmel-42717C-A
Tmega644P
A_Datasheet_Summary-10/2016
7
5.
Pin Configurations
5.1.
Pinout
5.1.1.
PDIP
(PCINT8/XCK0/T0)
(PCINT9/CLKO/T1)
(PCINT10/INT2/AIN0)
(PCINT1
1/OC0A/AIN1)
(PCINT12/OC0B/
(PCINT13/MOSI)
(PCINT14/MISO)
(PCINT15//SCK)
(PCINT24/RXD0)
(PCINT25/TXD0)
(PCINT26/RXD1/INT0)
(PCINT27/TXD1/INT1)
(PCINT28/XCK1/OC1B)
(PCINT29/OC1A)
(PCINT30/OC2B/ICP1)
(ADC0/PCINT0)
(ADC1/PCINT1)
(ADC2/PCINT2)
(ADC3/PCINT3)
(ADC4/PCINT4)
(ADC5/PCINT5)
(ADC6/PCINT6)
(ADC7/PCINT7)
(TOSC2/PCINT23)
(TOSC1/PCINT22)
(TDI/PCINT21)
(TDO/PCINT20)
(TMS/PCINT19)
(TCK/PCINT18)
(SDA/PCINT17)
(SCL/PCINT16)
(OC2A/PCINT31)
Power
Ground
Programming/debug
Digital
Analog
Crystal/Osc
XT
AL2
XT
AL1
Atmel A
Tmega644P
A [DA
T
ASHEET]
Atmel-42717C-A
Tmega644P
A_Datasheet_Summary-10/2016
8
5.1.2.
TQFN and QFN
Power
Ground
Programming/debug
Digital
Analog
Crystal/Osc
1
2
3
4
43
42
41
40
39
38
37
5
6
7
8
35
34
22
21
20
19
18
17
36
9
10
11
12
13
14
15
16
(PCINT13/MOSI) PB5
(PCINT14/MISO) PB6
(PCINT15/SCK) PB7
RESET
VCC
GND
XT
AL2
XT
AL1
(PCINT24/RXD0) PD0
(PCINT25/TXD0) PD1
(PCINT26/RXD1/INT0) PD2
44
32
31
30
29
28
27
26
24
23
25
33
PB4 (SS/OC0B/PCINT12)
PB3 (AIN1/OC0A/PCINT1
1)
PB2 (AIN0/INT2/PCINT10)
PB1 (T1/CLKO/PCINT9)
PB0 (XCK0/T0/PCINT8)
GND
VCC
P
A0 (ADC0/PCINT0)
P
A1 (ADC1/PCINT1)
P
A2 (ADC2/PCINT2)
P
A3 (ADC3/PCINT3)
P
A4 (ADC4/PCINT4)
P
A5 (ADC5/PCINT5)
P
A6 (ADC6/PCINT6)
P
A7 (ADC7/PCINT7)
AREF
GND
A
VCC
PC7 (TOSC2/PCINT23)
PC6 (TOSC1/PCINT22)
PC5 (TDI/PCINT21)
PC4 (TDO/PCINT20)
(PCINT27/TXD1/INT1) PD3
(PCINT28/XCK1/OC1B) PD4
(PCINT29/OC1A) PD5
(PCINT30/OC2B/ICP1) PD6
(PCINT31/OC2A) PD7
VCC
GND
(PCINT16/SCL) PC0
(PCINT17/SDA) PC1
(PCINT18/TCK) PC2
(PCINT19/TMS) PC3
5.2.
Pin Descriptions
5.2.1.
VCC
Digital supply voltage.
5.2.2.
GND
Ground.
5.2.3.
Port A (P
A[7:0])
This port serves as analog inputs to the Analog-to-digital Converter
.
Atmel A
Tmega644P
A [DA
T
ASHEET]
Atmel-42717C-A
Tmega644P
A_Datasheet_Summary-10/2016
9
P1-P3
P4-P6
P7-P9
P10-P12
P13-P15
P16-P17
ATMEGA644PA-ANR
Mfr. #:
Buy ATMEGA644PA-ANR
Manufacturer:
Microchip Technology / Atmel
Description:
8-bit Microcontrollers - MCU AVR 64KB FLSH 2KB EE 4KB RAM-16MHz 105C
Lifecycle:
New from this manufacturer.
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