* USB Specification Compliance
˙Support Full-Speed and Low-Speed USB 2.0 specification.
˙Built-in USB Transceiver.
˙Built-in 1.5k pull-high resistor.
˙Support one address and four 8-byte and two 32-byte data endpoints.
˙Support USB Suspend and Resume function.
˙One Control IN/OUT endpoints, two INT,BULK endpoints.
* 8-bit RISC microprocessor
˙6K x 14 internal program OTP-ROM.
˙256 bytes internal SRAM.
˙Optional 12MHz/24MHz internal MCU clock by configuration.
˙Optional Default/16MHz/12MHz/6MHz/58KHz internal
MCU clock by firmware.
˙One Watch dog Timer ,Timer0,Timer1,and two captures Timers.
* System Clock
˙ Internal Oscillator
˙Internal +/- 4% 24MHz Oscillator
˙0.25% Accuracy after USB traffic is received.
˙Internal slow oscillator 58KHz free run clock for suspend mode.
˙Built-in flexible programming PLL for external Oscillator or crystal
˙Operating Frequency Range of Oscillator/crystal is 2~48 MHz.
˙Optional external ceramic resonator or internal clock mode..
* 16-I/O ports
˙High current drive on any GPIO pin : 25mA/pin current sink.
˙Each GPIO pin supports high-impedance input, internal pull-ups,
open drains output, or CMOS outputs.
* Power Manager and consumption
˙Power on reset (POR) is 2.0V
˙Chip can work on greater than 2.2V power.
˙Low Voltage Detect is 3.8V
˙Regulator 3.3V output, supply 45mA current.
˙MCU operating at 24MHz clock
˙Enable USB operating current is 17mA at Vcc=5V.
˙Disable USB operating current is 6mA at Vcc=3.3V.
˙MCU operating at 12MHz clock
˙Enable USB operating current is 13mA at Vcc=5V.
˙Disable USB operating current is 4mA at Vcc=3.3V
* GPIO supply 1.8V~5V interface.
* Support SSC to reduce EMI.
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