Rev. 1.0 11/12Copyright © 2012 by Silicon LaboratoriesSiM3U1xxSiM3U1xxHigh-Performance, Low-Power, 32-Bit Precision32™USB MCU Family with up to 256 kB of Flash32-bit ARM® Cortex™-M3 CPU- 80 MHz maximum frequency- Single-cycle multiplication, hardware division support- Nested vectored interrupt control (NVIC) with 16 priority levelsMemory- 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 mem-ory and a parallel LCD interface with QVGA resolutionPower Management- Low drop-out (LDO) regulator- Power-on reset circuit and brownout detectors- 5–3.3 V 150 mA regulator supports direct USB power- Adjustable external regulator supports up to 3.6 V, 1000 mA- Multiple power modes supported for low power optimizationLow 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 128xClock Sources- Internal oscillator with PLL: 23-80 MHz, reduced EMI mode- USB internal 48 MHz oscillator supports crystal-less operation- 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 CrystalTemperature Range: –40 to 85 °CPackage 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-bitmode or 1 Msps 10-bit mode, internal or external reference- 2 x 10-Bit Current-mode Digital-to-Analog Converters, four-word buffer enables 12-bit operation- 2 x Low-current comparators- 16-Channel Capacitance-to-Digital: Fast,
