ATXMEGA128A4_1012 Datasheet, PDF (6/108 Pages) ATMEL Corporation – 8/16-bit XMEGA A4 Microcontroller

XMEGA A4
3.1 Block Diagram
Figure 3-1. XMEGA A4 Block Diagram
PR[0..1]
XTAL1/
TOSC1
XTAL2/
TOSC2
PA[0..7]
PB[0..3]
PORT A (8)
ACA
ADCA
AREFA
VCC/10
Int. Ref.
Tempref
AREFB
PORT B (4)
DACB
PORT R (2)
Oscillator
Circuits/
Clock
Generation
Real Time
Counter
DATA BUS
Event System
Controller
DMA
Controller
SRAM
Oscillator
Control
Sleep
Controller
BUS
Controller
Prog/Debug
Controller
Watchdog
Oscillator
Watchdog
Timer
Power
Supervision
POR/BOD &
RESET
PDI
DES
OCD
CPU
AES
Interrupt
Controller
NVM Controller
Flash
EEPROM
TWIE
USARTE0
TCE0
VCC
GND
RESET/
PDI_CLK
PDI_DATA
PE[0..3]
IRCOM
DATA BUS
EVENT ROUTING NETWORK
PORT C (8)
PC[0..7]
PORT D (8)
PD[0..7]
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