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