diff --git a/README.md b/README.md
index aa05abf..50385aa 100644
--- a/README.md
+++ b/README.md
@@ -51,8 +51,8 @@ Possible choices :
 ## MCU Pin assignement table :
 | Pin Number | Pin Name | Type | Function | Pull UP/DOWN| Connected to | Comment |
 |------------|----------|------|----------|-------------|--------------|---------|
-||PB_20|I/O|UART0_RX/PWM1/UART1_CTS/**I²C_SCL**|U/D|**USB/Serial TX pin** and **BMA456, Touch Panel, HMC5883L and BMP280 SCL pins**||
-||PB_19|I/O|UART0_TX/PWM0/UART1_RTS/**I²C_SDA**|U/D|**USB/Serial RX pin** and **BMA456, Touch Panel, HMC5883L and BMP280 SDA pins**||
+||PB_20|I/O|**UART0_RX**/PWM1/UART1_CTS/I²C_SCL|U/D|**USB/Serial TX flash pin**||
+||PB_19|I/O|**UART0_TX**/PWM0/UART1_RTS/**I²C_SDA**|U/D|**USB/Serial RX flash pin** and **BMA456, Touch Panel, HMC5883L and BMP280 SDA pins**||
 ||WAKEUP|I|**External Wake Up Pin**|D|**BMA456 IRQ line** and **Touch Panel IRQ line**|The chip is waken up when the pin is HIGH|
 ||RESET|I|Reset Pin|D|**Micro switch** and **USB/Serial RTS pin**||
 ||XTAL_OUT|O|External crystal output||||
@@ -64,23 +64,23 @@ Possible choices :
 ||AVDD3V3_AUX|P|Chip power supply, 3.3V||||
 ||TEST|I|Test function configuration pin||||
 ||BOOTMODE|I/O|BOOTMODE and I²S_MCLK/LSPI_CS/PWM2/I²S_DO|U/D|||
-||PA_1|I/O|JTAG_CK/I²C_SCL/PWM3/I²S_LRCK/**ADC0**|U/D|**Battery resistor voltage divider output**||
-||PA_4|I/O|JTAG_SWO/I²C_SDA/**PWM4**/I²S_BCK/ADC1 |U/D|**Screen backlight N-MOSFET driver**||
-||PA_7|I/O|PWM4/LSPI_MOSI/I²S_MCK/I²S_DI/Touch0|U/D|||
+||PA_1|I/O|JTAG_CK/**I²C_SCL**/PWM3/I²S_LRCK/ADC0|U/D|**BMA456, Touch Panel, HMC5883L and BMP280 SCL pins**||
+||PA_4|I/O|JTAG_SWO/I²C_SDA/PWM4/I²S_BCK/**ADC1**|U/D|**Battery resistor voltage divider output**||
+||PA_7|I/O|**PWM4**/LSPI_MOSI/I²S_MCK/I²S_DI/Touch0|U/D|**LCD backlight N-MOSFET driver**||
 ||VDD3V3IO|P|IO power supply, 3.3V||||
-||PB_0|I/O|PWM0/LSPI_MISO/UART3_TX/PSRAM_CK/Touch3|U/D|||
+||PB_0|**I/O**|PWM0/LSPI_MISO/UART3_TX/PSRAM_CK/Touch3|U/D|**Battery resistor voltage divider enable**||
 ||PB_1|I/O|PWM1/LSPI_CK/UART3_RX/PSRAM_CS/Touch4|U/D|||
-||PB_2|I/O|PWM2/LSPI_CK/UART2_TX/PSRAM_D0/Touch5|U/D|||
+||PB_2|I/O|PWM2/LSPI_CK/**UART2_TX**/PSRAM_D0/Touch5|U/D|**Serial output for debug**||
 ||PB_3|I/O|PWM3/LSPI_MISO/UART2_RX/PSRAM_D1/Touch6|U/D|||
 ||PB_4|I/O|LSPI_CS/UART2_RTS/UART4_TX/PSRAM_D2/Touch7|U/D|||
 ||PB_5|I/O|LSPI_MOSI/UART2_CTS/UART4_RX/PSRAM_D3/Touch8|U/D|||
 ||VDD3V3IO|P|IO power supply, 3.3V||||
 ||CAP|I|External capacitor, 4.7µF||||
-||PB_6|I/O|UART1_TX/**MMC_CLK**/HSPI_CK/SDIO_CK/Touch9|U/D|||
-||PB_7|I/O|UART1_RX/**MMC_CMD**/HSPI_INT/SDIO_CMD/Touch10|U/D|||
-||PB_8|I/O|I²S_BCK/MMC_D0/PWM_BREAK/SDIO_D0/Touch11|U/D|||
-||PB_9|I/O|I²S_LRCK/MMC_D1/HSPI_CS/SDIO_D1/Touch12|U/D|||
-||PB_10|I/O|I²S_DI/MMC_D2/HSPI_DI/SDIO_D2|U/D|||
+||PB_6|I/O|UART1_TX/**MMC_CLK**/HSPI_CK/SDIO_CK/Touch9|U/D|**LCD Serial Clock Pin**||
+||PB_7|I/O|UART1_RX/**MMC_CMD**/HSPI_INT/SDIO_CMD/Touch10|U/D|**LCD Serial Data Pin**||
+||PB_8|**I/O**|I²S_BCK/MMC_D0/PWM_BREAK/SDIO_D0/Touch11|U/D|**LCD Data or Command Selection Pin**||
+||PB_9|**I/O**|I²S_LRCK/MMC_D1/HSPI_CS/SDIO_D1/Touch12|U/D|**LCD Reset Pin**||
+||PB_10|**I/O**|I²S_DI/MMC_D2/HSPI_DI/SDIO_D2|U/D|**LCD Chip Select Pin**||
 ||VDD3V3IO|P|IO power supply, 3.3V||||
 ||PB_11|I/O|I²S_DO/MMC_D3/HSPI_DO/SDIO_D3|U/D|||
 ||GND|P|Ground (Central Pad)||||