原标题：Silabs C8051F850 8位系统级(SoC)MCU开发方案

　　Silabs公司的C8051F85x/86x系列产品是全集成的混合信号系统级(SoC)8位MCU,集成了上电重置,电压监视器,看门狗定时器和时钟振荡器,高达8kB闪存,片上调试,12位ADC等,工作电压2.2V-3.6V,具有高级模拟和通信外设,2kB-8kB闪存,高性能,小封装和低价格优点，非常适合无刷直流电机控制等应用，例如遥控直升机和汽车,个人电脑和电风扇,电动工具和小家电以及其它消费和工业类应用，例如电源,电池充电器,机顶盒,投影机,照明设备和光收发模块.本文介绍了C8051F85x/86x主要特性,框图以及C8051F850 MCU卡调试连接图,电路图和材料清单.

　　The C8051F85x/86x device family are fully integrated, mixed-signal system-on-a-chip MCUs.With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the C8051F85x/86x devices are truly standalone system-on-a-chip solutions. The flash memory is rEPROgrammable in-circuit, providing non-volatile data storage and allowing field upgrades of the firmware. The on-chip debugging interface (C2) allows non-intrusive (uses no on-chip resources), full speed, in-circuit debugging using the production MCU installed in the final application. This debug logic supports inspection and modification of memory and registers, setting breakpoints, single stepping, and run and halt commands. All analog and digital peripherals are fully functional while debugging. Each device is specified for 2.2 to 3.6 V operation, and are available in 20-pin QFN, 16-pin SOIC or 24-pin QSOP packages. All package options are lead-free and RoHS compliant. The device is available in two temperature grades: -40 to +85 ℃ or –40 to +125 ℃.

　　C8051F85x/86x主要特性:

　　Core:

　　Pipelined CIP-51 Core

　　Fully compatible with standard 8051 instruction set

　　70% of instructions execute in 1-2 clock cycles

　　25 MHz maximum operating frequency

　　Memory:

　　2-8 kB flash; in-system programmable in 512-byte sectors

　　512 bytes RAM (including 256 bytes standard 8051 RAM and 256 bytes on-chip XRAM)

　　Power:

　　Internal low drop-out (LDO) regulator for CPU core voltage

　　Power-on reset circuit and brownout detectors

　　I/O: Up to 18 total multifunction I/O pins:

　　All pins 5 V tolerant under bias

　　Flexible peripheral crossbar for peripheral routing

　　5 mA source, 12.5 mA sink allows direct drive of LEDs

　　Clock Sources:

　　Low-power internal oscillator: 24.5 MHz ±2%

　　Low-frequency internal oscillator: 80 kHz

　　External CMOS clock option

　　Timers/Counters and PWM:

　　3-channel Programmable Counter Array (PCA) supporting PWM, capture/compare and frequency output modes

　　4x 16-bit general-purpose timers

　　Independent watchdog timer, clocked from low frequency oscillator

　　Communications and Other Digital Peripherals:

　　UART

　　SPI™

　　I2C / SMBus™

　　16-bit CRC Unit, supporting automatic CRC of flash at 256-byte boundaries

　　Analog:

　　12-Bit Analog-to-Digital Converter (ADC)

　　2 x Low-Current Comparators

　　On-Chip Debugging

　　图1. C8051F85x/86x系列产品框图

　　C8051F850 MCU卡

　　The easiest way to begin development with the C8051F85x/6x AEC-Q100 qualified, low-cost microcontroller family is with the fully functional C8051F850DK development kit. This comprehensive development kit is designed to give customers an out-of-box experience and comes with everything developers need to evaluate hardware and develop code.

　　The C8051F850 MCU card enables application development on the C8051F85x/86x MCU device family. 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. C8051F850 MCU卡调试连接图

　　图3.C8051F850 MCU卡电路图(1)

　　图4.C8051F850 MCU卡电路图(2)

　　图5.C8051F850 MCU卡电路图(3)

　　图6.C8051F850 MCU卡电路图(4)

　　图7.C8051F850 MCU卡电路图(5)

　　C8051F850 MCU卡材料清单: