技术特性

• Core
  • ARM7TDMI 32-bit RISC CPU
  • 59 MIPS @ 66 MHz from SRAM
  • 45 MIPS @ 50 MHz from Flash
• Memories
  • Up to 256 Kbytes Flash program memory (10 kcycles endurance, 20 years retention @ 85° C)
  • 16 Kbytes Flash data memory (100 kcycles endurance, 20 years retention@ 85° C)
  • Up to 64 Kbytes RAM
  • External Memory Interface (EMI) for up to 4 banks of SRAM, Flash, ROM
  • Multi-boot capability
• Clock, reset and supply management
  • 3.0 to 3.6V application supply and I/Os
  • Internal 1.8V regulator for core supply
  • Clock input from 0 to 16.5 MHz
  • Embedded RTC osc. running from external 32 kHz crystal
  • Embedded PLL for CPU clock
  • Realtime Clock for clock-calendar function
  • 5 power saving modes: SLOW, WAIT, LPWAIT, STOP and STANDBY modes
• Nested interrupt controller
  • Fast interrupt handling with multiple vectors
  • 32 vectors with 16 IRQ priority levels
  • 2 maskable FIQ sources
• Up to 48 I/O ports
  • 30/32/48 multifunctional bidirectional I/Os Up to 14 ports with interrupt capability
• 5 Timers
  • 16-bit watchdog timer
  • 3 16-bit timers with 2 input captures, 2 output compares, PWM and pulse counter
  • 16-bit timer for timebase functions
• 10 communications interfaces
  • 2 I²C interfaces (1 multiplexed with SPI)
  • 4 UART asynchronous serial interfaces
  • Smartcard ISO7816-3 interface on UART1
  • 2 BSPI synchronous serial interfaces
  • CAN interface (2.0B Active)
  • USB Full Speed (12 Mbit/s) Device Function with Suspend and Resume
  • HDLC synchronous communications
• 4-channel 12-bit A/D converter
  • Sampling frequency up to 1 kHz
  • Conversion range: 0 to 2.5 V
• Development tools support
  • Atomic bit SET and RES operations

功能框图