ATXMEGA128B1 Datasheet, PDF (5/138 Pages) ATMEL Corporation – 8/16-bit Atmel XMEGA B1 Microcontroller

3.1 Block Diagram
Figure 3-1. XMEGA B1 Block Diagram
PR[0..1]
XTAL1 /
TOSC1
XTAL2 /
TOSC2
Power
Ground
Digital function
Analog function / Oscillators
LCD
Programming, debug, test
External clock / Crystal pins
General Purpose I/O
PA[0..7]
PB[0..7]/
JTAG
PORT A (8)
ACA
ADCA
AREFA
VCC/10
Int. Refs.
Tempref
AREFB
ADCB
ACB
PORT B (8)
PORT R (2)
EVENT ROUTING NETWORK
Oscillator
Circuits/
Clock
Generation
DATA BUS
Real Time
Counter
Event System
Controller
DMA
Controller
SRAM
Oscillator
Control
Sleep
Controller
Watchdog
Oscillator
Watchdog
Timer
Power
Supervision
POR/BOD &
RESET
BUS Matrix
Prog/Debug
PDI
Controller
AES
DES
CRC
CPU
OCD
Interrupt
Controller
JTAG
PORT B
LCD
NVM Controller
Flash
EEPROM
PORT M (8)
PORT G (8)
VCC
GND
RESET /
PDI_CLK
PDI_DATA
LCD POWER[0..4]
COM[0..3]
SEG[0..23]
SEG[31..24] /
PM[0..7]
SEG[39..32] /
PG[0..7]
DATA BUS
EVENT ROUTING NETWORK
PORT C (8)
PORT D (3)
PC[0..7]
PD[0..2]
PORT E (8)
To Clock
Generator
TOSC1
TOSC2
PE[0..7]
(Alternate)
XMEGA B1 [DATASHEET]
5
8330C–AVR–07/2012