技术特性

• Memories
  • Up to 16 Kbytes of ROM or High Density Flash (HDFlash) program memory with read/write protection, HDFlash In-Circuit and In-Application Programming. 100 write/erase cycles guaranteed, data retention: 40 years at 55°C
  • Up to 768 bytes of RAM including up to 128 bytes stack and 256 bytes USB buffer
• Clock, reset and supply management
  • Low voltage reset
  • 2 power saving modes: Halt and Wait modes
  • PLL for generating 48 MHz USB clock using a 4 MHz crystal
• Interrupt management
  • Nested Interrupt controller
• USB (Universal Serial Bus) interface
  • 256-byte buffer for full speed bulk, control and interrupt transfer types compliant with USB specification (version 2.0)
  • On-Chip 3.3V USB voltage regulator and transceivers with software power-down
  • 7 USB endpoints:
    • One 8-byte Bidirectional Control Endpoint
    • One 64-byte In Endpoint,
    • One 64-byte Out Endpoint
    • Four 8-byte In Endpoints
• 35 or 4 I/O ports
  • Up to 4 LED outputs with software programmable constant current (3 or 7 mA).
  • 2 General purpose I/Os programmable as interrupts
  • Up to 8 line inputs programmable as interrupts
  • Up to 20 outputs
  • 1 line assigned by default as static input after reset
• ISO7816-3 UART interface
  • 4 MHz clock generation
  • Synchronous/Asynchronous protocols (T=0, T=1)
  • Automatic retry on parity error
  • Programmable baud rate from 372 clock pulses up to 11.625 clock pulses (D=32/F=372)
  • Card Insertion/Removal Detection
• Smartcard power supply
  • Selectable card VCC 1.8V, 3V, and 5V
  • Internal step-up converter for 5V supplied Smartcards (with a current of up to 55mA) using only two external components.
  • Programmable Smartcard Internal Voltage Regulator (1.8V to 3.0V) with current overload protection and 4 KV ESD protection (Human Body Model) for all Smartcard Interface I/Os
• One 8-bit timer
  • Time Base Unit (TBU) for generating periodic interrupts.
• Development tools
  • Full hardware/software development package
• ECOPACK®packages

功能框图