| 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 |