32-bit ARM® Cortex™-M3 CPU
- 80 MHz maximum frequency
- Single-cycle multiplication, hardware division support
- Nested vectored interrupt control (NVIC) with 16 priority levels

Memory
- 32–256 kB Flash, in-system programmable
- 8–32 kB SRAM (including 4 kB retention SRAM)
- 16-channel DMA controller
- External bus interface supports up to 16 MB of external memory and a parallel LCD interface with QVGA resolution

Power Management
- Low drop-out (LDO) regulator
- Power-on reset circuit and brownout detectors
- 5-to-3.3 V 150 mA regulator supports up to 5 V input supply
- Adjustable external regulator supports up to 3.6 V, 1000 mA
- Multiple power modes supported for low power optimization

Low Power Features
- 85 nA current mode with voltage supply monitor enabled
- Low-current RTC: 350 nA internal LFO, 620 nA external crystal
- 12 µs wakeup (lowest power mode); 1.5 µs analog setting time
- 275 µA/MHz active current
- Clocks can be gated off from unused peripherals to save power
- Flexible clock divider: Reduce operational frequency up to 128x

Clock Sources
- Internal oscillator with PLL: 23–80 MHz, reduced EMI mode
- Low power internal oscillator: 20 MHz and 2.5 MHz modes
- Low frequency internal oscillator: 16.4 kHz
- External oscillators: Crystal, RC, C, CMOS and RTC Crystal

Temperature Range: –40 to +85 °C
Package Options
- QFN options: 40-pin (6 x 6 mm), 64-pin (9 x 9 mm)
- TQFP options: 64-pin (10 x 10 mm), 80-pin (12 x 12 mm)
- LGA option: 92-pin (7 x 7 mm)

Analog Peripherals
- 2 x 12-Bit Analog-to-Digital Converters: Up to 250 ksps 12-bit mode or 1 Msps 10-bit mode, internal or external reference
- 2 x 10-Bit Current-mode Digital-to-Analog Converters, fourword buffer enables 12-bit operation
- 2 x Low-current comparators
- 16-Channel Capacitance-to-Digital: Fast, <1 µA wake-on-touch
- 2 x Current-to-Voltage Converter, up to 6 mA input range

Digital and Communication Peripherals
- 2 x USARTs and 2 x UARTs with IrDA and ISO7816 SmartCard
- 3 x SPIs, 2 x I2C, I2S (receive and transmit), 16/32-bit CRC
- 128/192/256-bit Hardware AES Encryption

Timers/Counters
- 2 x 32-bit or 4 x 16-bit timers with capture/compare
- 2 x 16-bit, 2-channel counters with capture/compare/PWM
- 16-bit, 6-channel counter with capture/compare/PWM and dead-time controller with differential outputs
- 16-bit low power timer/pulse counter operational in sleep
- 32-bit real time clock (RTC) with multiple alarms
- Watchdog timer

Up to 65 Flexible I/O
- Up to 59 contiguous GPIO with two priority crossbars providing flexibility in pin assignments; 12 x 5 V tolerant GPIO
- Up to 6 programmable high drive capable (5–300 mA, 1.8–6 V) I/O can drive LEDs, power MOSFETs, buzzers, etc.

On-Chip Debugging
- Serial wire debug (SWD) or JTAG (no boundary scan), serial wire viewer (SWV)
- Cortex-M3 embedded trace macrocell (ETM)

Supply Voltage
- 2.7 to 5.5 V (regulator enabled)
- 1.8 to 3.6 V (regulator disabled)