General Description
This device is an 8-bit high performance RISC-like microcontroller designed for USB product applications. It is particularly suitable for use in products such as mice, keyboards and joystick. A HALT feature is included to reduce power consumption.

Features
• Operating voltage: fSYS=6M/12MHz: 4.4V~5.5V
• Low voltage reset function
• 32 bidirectional I/O lines (max.)
• 8-bit programmable timer/event counter with overflow interrupt
• 16-bit programmable timer/event counter and overflow interrupts
• Crystal oscillator (6MHz or 12MHz)
• Watchdog Timer
• 6 channels 8-bit A/D converter
• PS2 and USB modes supported
• USB1.1 low speed function
• 4 endpoints supported (endpoint 0 included)
• 409615 program memory ROM
• 1608 data memory RAM
• HALT function and wake-up feature reduce power consumption
• 8-level subroutine nesting
• Up to 0.33μs instruction cycle with 12MHz system clock at VDD=5V
• Bit manipulation instruction
• 15-bit table read instruction
• 63 powerful instructions
• All instructions in one or two machine cycles
• 28-pin SOP, 48-pin SSOP package