Universal Serial Bus Features:

• USB V2.0 Compliant

• Crystal-less Full Speed (12 Mb/s) and Low-Speed

Operation (1.5 Mb/s)

• Supports Control, Interrupt, Isochronous and Bulk

Transfers

• Supports up to 32 Endpoints (16 Bidirectional)

• 1 Kbyte Dual Access RAM for USB

• On-Chip USB Transceiver

Special Microcontroller Features:

• Low-Power, High-Speed CMOS Flash Technology

• C Compiler Optimized Architecture for Re-Entrant

Code

• Power Management Features:

- Run: CPU on, peripherals on, SRAM on

- Idle: CPU off, peripherals on, SRAM on

- Sleep: CPU off, peripherals off, SRAM on

• Priority Levels for Interrupts

• Self-Programmable under Software Control

• 8 x 8 Single-Cycle Hardware Multiplier

• Extended Watchdog Timer (WDT):

- Programmable period from 4 ms to 131s

• Single-Supply In-Circuit Serial Programming™

(ICSP™) via Two Pins

• In-Circuit Debug (ICD) with Three Breakpoints via

Two Pins

• Optional dedicated ICD/ICSP Port (44-pin TQFP

Package Only)

• Wide Operating Voltage Range:

- F devices: 2.3V to 5.5V

- LF devices: 1.8V to 3.6V

• Flash Program Memory of 10,000 Erase/Write

Cycles Minimum and 20-year Data Retention