原标题：Silabs SiM3C1xx系列32位ARM MCU开发方案

　　Silabs公司的SiM3C1xx系列是基于ARM Cortex-M3内核的32位MCU,是全集成的混合信号系统级芯片(SoC) MCU,最高工作频率80MHz,单周期乘法,支持硬件除法,集成了可在系统编程的32-256KB闪存,8-32KB SRAM和16路DMA控制器,模拟特性包括2个12位ADC,2个10位DAC,2个低电流比较器和2个电流/电压转换器,数字和通信接口包括2个USART和2个UART,3个SPI,2个I2C,I2S和16/32位CRC以及128/192/256位硬件AES加密.本文介绍了SiM3C1xx主要特性,框图, 标准开发平台(UDP)框图,以及SiM3C1xx MCU卡特性,电路图和材料清单.

　　The SiM3C1xx Precision32™ devices are fully integrated, mixed-signal system-on-a-chip MCUs.

　　SiM3C1xx主要特性:

　　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, four-word 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)

　　图1. SiM3C1xx系列框图

　　SiM3C1xx MCU卡

　　The Unified Development Platform (UDP) provides a development and demonstration platform for Silicon Laboratories microcontrollers, short-range wireless devices, and software tools, including the Silicon Laboratories Integrated Development Environment (IDE).

　　The SiM3C1xx MCU card enables application development on the SiM3C1xx MCU. The card connects to the MCU Card expansion slot on the UDP motherboard and provides complete access to the MCU resources. Each expansion board has a unique ID that can be read out of an EEPROM or MCU on the board, which enables software tools to recognize the connected hardware and automatically select the appropriate firmware image. The target MCU card can also be detached from the UDP and used alone as a development or demonstration tool.

　　图2.标准开发平台(UDP)框图

　　图3.UDP SiM3C1xx MCU卡外形图

　　UDP SiM3C1xx MCU卡材料清单: