AT43USB326_06 Datasheet, PDF (1/102 Pages) ATMEL Corporation – Multimedia USB Keyboard Controller with Embedded Hub

Features
• AVR^® 8-bit RISC Microcontroller with 83 ns Instruction Cycle Time
• USB Hub with One Attached and Two External Ports
• USB Keyboard Function with Three Programmable Endpoints
• 16 KB Program Memory, 512 Bytes Data SRAM
• 32 x 8 General-purpose Working Registers
• 32 Programmable I/O Port Pins
• Support for 18 x 8 Keyboard Matrix
• Keyboard Scan Inputs with Pull-up Resistor
• Four LED Driver Outputs
• One 8-bit Timer/Counter with Separate Pre-scaler
• External and Internal Interrupt Sources
• Programmable Watchdog Timer
• 6 MHz Oscillator with On-chip PLL
• 5V Operation with On-chip 3.3V Power Supply
• 48-lead LQFP Package
Description
The Atmel AT43USB326 is an 8-bit microcontroller based on the AVR RISC architec-
ture. By executing powerful instructions in a single clock cycle, the AT43USB326
achieves throughputs approaching 12 MIPS. The AVR core combines a rich instruc-
tion set with 32 general-purpose working registers. All 32 registers are directly
connected to the ALU allowing two independent registers to be accessed in one single
instruction executed in one clock cycle. The resulting architecture is more code effi-
cient while achieving throughputs up to ten times faster than conventional CISC
microcontrollers.
Furthermore, the AT43USB326 features an on-chip 16-Kbyte program memory and
512 bytes of data memory. It is supported by a standard set of peripherals such as
timer/counter modules, watchdog timer and internal and external interrupt sources.
The major peripheral included in the AT43USB326 is the USB Hub with an embedded
keyboard controller function.
Multimedia
USB Keyboard
Controller with
Embedded Hub
AT43USB326
3313D–USB–04/06
1