anchor.diff:  C7,PC7
   B8,PB8
   B9,PB9
  -B12,PB12
  -B13,PB13
  -B14,PB14
  -B15,PB15
  +MUX_A1,PB12
  +MUX_A0,PB13
  +MUX_EN,PB14
  +CS_DAC,PB15
   B10,PB10
   B11,PB11
  -B0,PB0
  -B1,PB1
  +PIN_RESET,PB0
  +PIN_OFF,PB1
   Y13,Reset
   Y14,GND
   Y15,3.3V
   Y16,VIN
  -LED_BLUE,PB4
  -LED_RED,PA13
  -LED_GREEN,PA14
  -LED_YELLOW,PA15
  +LED_B,PB4
  +LED_R,PA13
  +LED_G,PA14
  +LED_Y,PA15
   SW,PA0
  -SD,PA8
  +CS_ADC,PA8
   B5,PB5
positive.code: C13,PC13
  C0,PC0
  C1,PC1
  C2,PC2
  C3,PC3
  X23,A3.3V
  X24,AGND
  
negative.code: B6,PB6
  B7,PB7
  C4,PC4
  PIN_BOOTSET,PC5
  X13,Reset
  X14,GND
  X15,3.3V
  