Datasheet
3XMEGA A4U [DATASHEET]
Atmel-8387G-AVR-ATxmega16A4U-34A4U-64A4U-128A4U-Datasheet_03/2014
2. Pinout/Block Diagram
Figure 2-1. Block Diagram and QFN/TQFP pinout
Note: 1. For full details on pinout and pin functions refer to “Pinout and Pin Functions” on page 54.
1
2
3
4
44
43
42
41
40
39
38
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
37
36
35
34
12
13
14
15
16
17
18
19
20
21
22
PA0
PA1
PA2
PA3
PA4
PB0
PB1
PB3
PB2
PA7
PA6
PA5
GND
VCC
PC0
VCC
GND
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PD0
PD1
PD2
PD3
PD4
PD5
PD6
VCC
GND
PD7
PE0
PE1
PE2
PE3
RESET/PDI
PDI
PR0
PR1
AVCC
GND
Power
Supervision
Port A
EVENT ROUTING NETWORK
DMA
Controller
BUS
matrix
SRAMFLASH
ADC
AC0:1
OCD
Port EPort D
Prog/Debug
Interface
EEPROM
Port C
TC0:1
Event System
Controller
Watchdog
Timer
Watchdog
OSC/CLK
Control
Real Time
Counter
Interrupt
Controller
DATA BUS
DATA BUS
Port R
USART0:1
TWI
SPI
TC0:1
USART0:1
SPI
TC0
USART0
TWI
Port B
DAC
AREF
AREF
Sleep
Controller
Reset
Controller
IRCOM
Crypto /
CRC
USB
CPU
Internal
references
Internal
oscillators
XOSC TOSC
Digital function
Analog function / Oscillators
Programming, debug, test
External clock / Crystal pins
General Purpose I /O
Ground
Power