􀂄 Support Full-Speed and Low-Speed USB 1.1 specification

􀂄 Built-in USB Transceiver and 3.3V regulator

􀂄 Support USB Suspend and Resume function

􀂄 One Control IN/OUT , two INT endpoints and two BULK endpoints

􀂄 Support PS2 compatible interface share with USB interface

􀂄 192 bytes internal SRAM in BULK mode;256(192+64) bytes internal SRAM in INT mode.

􀂄 6K x 14 internal program OTP-ROM

􀂄 8-bit RISC CPU core .

􀂄 Support Master/Slave SPI serial Communication Interface

􀂄 Support up to four user configured endpoints

􀂾 Up to three 8-byte data endpoints (EP0,EP1,EP2)

􀂾 Up to two 32-byte data endpoints (EP3,EP4)

􀂄 Internal Oscillator

􀂾 Internal +/- 4% 24MHz Oscillator

􀂾 0.25% Accuracy for USB without extra component

􀂄 Built-in programming PLL for external Oscillator or crystal.

􀂄 General-purpose programmable-level IO interface

􀂄 5V power supply only; GPIO support 1.8V~5V interface.

􀂄 Support SSC to reduce EMI