| PC13 | 
EXTI13 | 
BUTTON_BACK | 
Button | 
| PC14 | 
RCC_OSC32_IN | 
 | 
32768 kHz XTAL | 
| PC15 | 
RCC_OSC32_OUT | 
 | 
32768 kHz XTAL | 
| PH0 | 
RCC_OSC_IN | 
 | 
16 MHz XTAL | 
| PH1 | 
RCC_OSC_OUT | 
 | 
16 MHz XTAL | 
| PC0 | 
GPIO_Analog | 
 | 
External GPIO | 
| PC1 | 
GPIO_Analog | 
 | 
External GPIO | 
| PC2 | 
EXTI2 | 
CHRG | 
Charge state | 
| PC3 | 
ADC1_IN4 | 
BATT_V | 
Battery voltage | 
| PA0 | 
ADC1_IN5 | 
IR_RX | 
Infrared receiver | 
| PA1 | 
EXTI1 | 
BUTTON_DOWN | 
Button | 
| PA2 | 
GPIO_Output | 
DISPLAY_DI | 
Display | 
| PA3 | 
TIM5_CH4 | 
SPEAKER | 
 | 
| PA4 | 
GPIO_Analog | 
 | 
External GPIO | 
| PA5 | 
GPIO_Analog | 
 | 
External GPIO | 
| PA6 | 
GPIO_Analog | 
 | 
External GPIO | 
| PA7 | 
GPIO_Analog | 
 | 
External GPIO | 
| PC4 | 
GPIO_Output | 
NFC_CS | 
NFC SPI CS | 
| PC5 | 
COMP1_INP | 
RFID_RF_IN | 
125 kHz RFID RX, contact keys analog input (for Cyfral/metakom) | 
| PB0 | 
EXTI0 | 
BUTTON_UP | 
Button | 
| PB1 | 
GPIO_Output | 
LED_BLUE | 
Led | 
| PB2 | 
GPIO_Analog | 
 | 
External GPIO | 
| PB10 | 
GPIO_Output | 
DISPLAY_RST | 
Display | 
| PB11 | 
GPIO_Output | 
IR_TX | 
Infrared transmit | 
| PB12 | 
GPIO_Analog | 
 | 
External GPIO | 
| PB13 | 
TIM15_CH1N | 
RFID_OUT | 
RFID 125 kHz read master tone/write TX | 
| PB14 | 
GPIO_Output | 
LED_GREEN | 
Led | 
| PB15 | 
TIM15_CH2 | 
RFID_PULL | 
RFID 125 kHz write/emulate pulling | 
| PC6 | 
GPIO_Output | 
VIBRO | 
 | 
| PC7 | 
TIM8_CH2 | 
iButton | 
contact key | 
| PC8 | 
GPIO_Output | 
DISPLAY_CS | 
Dispay | 
| PC9 | 
GPIO_Output | 
SD_CS | 
microSD card SD | 
| PA8 | 
GPIO_Output | 
LED_RED | 
Led | 
| PA9 | 
USART1_TX | 
 | 
External GPIO/USART TX | 
| PA10 | 
USART1_RX | 
 | 
External GPIO/USART RX | 
| PA11 | 
USB_OTG_FS_DM | 
 | 
USB | 
| PA12 | 
USB_OTG_FS_DP | 
 | 
USB | 
| PA13 | 
SWDIO | 
 | 
External GPIO/SWDIO | 
| PA14 | 
SWCLK | 
 | 
External GPIO/SWDCLK | 
| PA15 | 
GPIO_Output | 
CC1101_CS | 
CC1101 CS | 
| PC10 | 
SPI3_SCK | 
 | 
SD/CC1101/NFC SPI | 
| PC11 | 
SPI3_MISO | 
 | 
SD/CC1101/NFC SPI | 
| PC12 | 
SPI3_MOSI | 
 | 
SD/CC1101/NFC SPI | 
| PD2 | 
GPIO_Analog | 
 | 
External GPIO | 
| PB3 | 
SPI1_SCK | 
 | 
Display | 
| PB4 | 
EXTI4 | 
BUTTON_LEFT | 
Button | 
| PB5 | 
SPI1_MOSI | 
 | 
Display | 
| PB6 | 
GPIO_Output | 
DISPLAY_BACKLIGHT | 
 | 
| PB7 | 
GPIO_Input | 
CC1101_G0 | 
 | 
| PB8 | 
EXTI8 | 
BUTTON_RIGHT | 
Button | 
| PB9 | 
EXTI9 | 
BUTTON_OK | 
Button |