ATXMEGA256A3B_09 ATMEL [ATMEL Corporation], ATXMEGA256A3B_09 Datasheet - Page 5

• Manufacturer Part Number: ATXMEGA256A3B_09
• Description: 8/16-bit XMEGA A3B Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

3.1
Figure 3-1.
8116F–AVR–09/09
PB[0..7]/
PA[0..7]
JTAG
Block Diagram
XMEGA A3B Block Diagram
PORT A (8)
PORT B (8)
Tempref
Int. Ref.
AREFA
VCC/10
AREFB
IRCOM
ADCA
ADCB
DACB
ACA
ACB
The XMEGA A3B devices are supported with a full suite of program and system development
tools including: C compilers, macro assemblers, program debugger/simulators, programmers,
and evaluation kits.
PORT C (8)
PC[0..7]
Event System
DES
AES
Controller
Controller
Controller
DMA
BUS
XTAL1
XTAL2
PR[0..1]
Flash
NVM Controller
PORT D (8)
DATA BUS
PD[0..7]
EVENT ROUTING NETWORK
CPU
SRAM
Generation
DATA BUS
Oscillator
Circuits/
Clock
PORT E (6)
Prog/Debug
Oscillator
Controller
Controller
Controller
EEPROM
Interrupt
Control
PE[0..5]
Sleep
OCD
32.768 kHz
Real Time
Counter
XOSC
TOSC1
TOSC2
JTAG
Watchdog
Watchdog
PDI
Oscillator
Supervision
POR/BOD &
Timer
RESET
Power
USARTF0
TCF0
Supervision
Controller
Backup
Battery
Power
PORT B
V
XMEGA A3B
BAT
PF[0..4,6..7]
RESET/
PDI_CLK
PDI_DATA
VBAT
GND
VCC
5