1 1 B2 - VBAT S VBAT2 2 A2 -PC13-TAMPERRTC(5) I/O PC13(6) TAMPER-RTC3 3 A1 - PC14-OSC32_IN(5) I/O PC14(6) OSC32_IN4 4 B1 -PC15-OSC32_OUT(5) I/O PC15(6) OSC32_OU自己到网上下载:STM32F103.pdf
