at90usb647-16au ATMEL Corporation, at90usb647-16au Datasheet - Page 5

• Manufacturer Part Number: at90usb647-16au
• Description: At90usb1286 8-bit Avr Microcontroller With 64/128k Bytes Of Isp Flash And Usb Controller
• Manufacturer: ATMEL Corporation

2.1
Figure 2-1.
7593GS–AVR–03/08
AREF
AGND
AVCC
GND
VCC
Block Diagram
ON-CHIP DEBUG
PROGRAMMING
BOUNDARY-
Block Diagram
JTAG TAP
LOGIC
SCAN
DATA REGISTER
DATA REGISTER
USART0
PORTE
PORTF
AT90USB64/128 achieves throughputs approaching 1 MIPS per MHz allowing the system
designer to optimize power consumption versus processing speed.
The AVR core combines a rich instruction set with 32 general purpose working registers. All the
32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent
registers to be accessed in one single instruction executed in one clock cycle. The resulting
architecture is more code efficient while achieving throughputs up to ten times faster than con-
ventional CISC microcontrollers.
PORTF DRIVERS
PORTE DRIVERS
PE7 - PE0
PF7 - PF0
INSTRUCTION
INSTRUCTION
PROGRAM
PROGRAM
COUNTER
REGISTER
CONTROL
DECODER
FLASH
LINES
ADC
REG. PORTE
REG. PORTF
DATA DIR.
DATA DIR.
DATA REGISTER
REGISTERS
POR - BOD
REGISTER
PURPOSE
GENERAL
POINTER
STATUS
STACK
RESET
SRAM
PORTB
DATA REGISTER
ALU
X
Y
Z
PORTA
PORTB DRIVERS
PB7 - PB0
PORTA DRIVERS
PA7 - PA0
REG. PORTB
DATA DIR.
REG. PORTA
DATA DIR.
MCU CONTROL
OSCILLATOR
WATCHDOG
INTERRUPT
COUNTERS
REGISTER
INTERNAL
EEPROM
TIMER/
TIMER
UNIT
SPI
8-BIT DATA BUS
DATA REGISTER
PORTD
DATA REGISTER
PORTD DRIVERS
PD7 - PD0
PORTC
OSCILLATOR
TIMING AND
CALIB. OSC
CONTROL
PORTC DRIVERS
PLL
USB
REG. PORTD
PC7 - PC0
DATA DIR.
AT90USB64/128
REG. PORTC
TWO-WIRE SERIAL
DATA DIR.
INTERFACE
5