说明：  这是我自已为实验室画的基于STM32的PCB，现在将原理图及PCB全部分享，图是用PROTEL 99SE绘制的。可能会有布线不合理之处，仅供大家参考。 实验板资源介绍 1）CPU为100脚STM32F103XX 2）TFTLCD 3）SD卡 4）4X4键盘模块及四个独立按键 5）ISP下载口及20脚JTAG下载口 6）RS232接口、RS485接口、PS/2接口、USB接口 7）I/O口驱动的蜂鸣器 8）I2C口驱动的AT24C02 9）三线SPI接口的DS1302 10）单路ADC 11）两路LED灯，方便实验板调试
(This is my own paintings for the laboratory-based STM32 of the PCB, schematic and PCB will now all share, map is drawn with PROTEL 99SE. Wiring may be unreasonable, only for your reference. Experimental board resource describes 1) CPU is 100 feet STM32F103XX 2) TFTLCD 3) SD cards 4) 4X4 keypad module and four separate buttons 5) ISP download port and 20-pin JTAG download port 6) RS232 Interface, RS485 Interface, PS/2 Interface, USB Interface 7) I/O port driver buzzer 8) I2C port driven AT24C02 9) three-wire SPI interface, the DS1302 10) single ADC 11) Two LED lights, to facilitate debugging test board)