- Operating voltage:
- MCU: 2.2V~5.5V
- USB mode: 2.7V~5.5V - Oscillator types:
- External High Speed Crystal - HXT
- Internal High Speed RC - HIRC
- External 32.768kHz Crystal - LXT
- Internal 32kHz RC - LIRC - Fully integrated internal 12MHz oscillator with 0.25% accuracy for all USB modes which requires no external components
- Smart Card interface compatible with and certifiable to the ISO 7816-3 Standards
- 1.8V, 3V, 5V smart card supply
- USB interface:
- USB 2.0 Full Speed compatible
- 8 endpoints supported including endpoint 0
- All endpoints except endpoint 0 can support interrupt and bulk transfer
- All emdpoints except endpoint 0 can be configured as 8, 16, 32, 64 bytes FIFO size
- Endpoint 0 supports control transfer
- Endpoint 0 FIFO size: 8 bytes
- Integrated an internal 1.5kΩ pull-high resistor on UDP pin
- Support 3.3V LDO
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