{
  "build": {
    "core": "stm32", 
    "cpu": "cortex-m3", 
    "f_cpu": "72000000L", 
    "ldscript": "stm32f103xb.ld", 
    "mcu": "stm32f103rbt6", 
    "variant": "stm32f1"
  }, 
  "frameworks": [
    "mbed", 
    "libopencm3"
  ], 
  "name": "ST Nucleo F103RB", 
  "upload": {
    "maximum_ram_size": 20480, 
    "maximum_size": 131072
  }, 
  "url": "https://developer.mbed.org/platforms/ST-Nucleo-F103RB/", 
  "vendor": "ST"
}