diff --git a/variants/CH32V30x/CH32V307VCT6/PeripheralPins.c b/variants/CH32V30x/CH32V307VCT6/PeripheralPins.c
index 6074828..42e1793 100644
--- a/variants/CH32V30x/CH32V307VCT6/PeripheralPins.c
+++ b/variants/CH32V30x/CH32V307VCT6/PeripheralPins.c
@@ -135,6 +135,7 @@ WEAK const PinMap PinMap_UART_CTS[] = {
 WEAK const PinMap PinMap_SPI_MOSI[] = {
   {PA_7,  SPI1, CH_PIN_DATA(CH_MODE_OUTPUT_50MHz, CH_CNF_OUTPUT_AFPP, 0, AFIO_NONE)},
   {PB_15, SPI2, CH_PIN_DATA(CH_MODE_OUTPUT_50MHz, CH_CNF_OUTPUT_AFPP, 0, AFIO_NONE)},
+  {PB_5,  SPI3, CH_PIN_DATA(CH_MODE_OUTPUT_50MHz, CH_CNF_OUTPUT_AFPP, 0, AFIO_NONE)},
   {NC,    NP,   0}
 };
 #endif
@@ -143,6 +144,7 @@ WEAK const PinMap PinMap_SPI_MOSI[] = {
 WEAK const PinMap PinMap_SPI_MISO[] = {
   {PA_6,  SPI1, CH_PIN_DATA(CH_MODE_INPUT, CH_CNF_INPUT_FLOAT, 0, AFIO_NONE)},
   {PB_14, SPI2, CH_PIN_DATA(CH_MODE_INPUT, CH_CNF_INPUT_FLOAT, 0, AFIO_NONE)},
+  {PB_4,  SPI3, CH_PIN_DATA(CH_MODE_INPUT, CH_CNF_INPUT_FLOAT, 0, AFIO_NONE)},
   {NC,    NP,   0}
 };
 #endif
@@ -151,6 +153,7 @@ WEAK const PinMap PinMap_SPI_MISO[] = {
 WEAK const PinMap PinMap_SPI_SCLK[] = {
   {PA_5,  SPI1, CH_PIN_DATA(CH_MODE_OUTPUT_50MHz, CH_CNF_OUTPUT_AFPP, 0, AFIO_NONE)},
   {PB_13, SPI2, CH_PIN_DATA(CH_MODE_OUTPUT_50MHz, CH_CNF_OUTPUT_AFPP, 0, AFIO_NONE)},
+  {PB_3,  SPI3, CH_PIN_DATA(CH_MODE_OUTPUT_50MHz, CH_CNF_OUTPUT_AFPP, 0, AFIO_NONE)},
   {NC,    NP,   0}
 };
 #endif
@@ -159,6 +162,7 @@ WEAK const PinMap PinMap_SPI_SCLK[] = {
 WEAK const PinMap PinMap_SPI_SSEL[] = {
   {PA_4,  SPI1, CH_PIN_DATA(CH_MODE_OUTPUT_50MHz, CH_CNF_OUTPUT_AFPP, 0, AFIO_NONE)},
   {PB_12, SPI2, CH_PIN_DATA(CH_MODE_OUTPUT_50MHz, CH_CNF_OUTPUT_AFPP, 0, AFIO_NONE)},
+  {PA_15, SPI3, CH_PIN_DATA(CH_MODE_OUTPUT_50MHz, CH_CNF_OUTPUT_AFPP, 0, AFIO_NONE)},
   {NC,    NP,   0}
 };
 #endif
diff --git a/variants/CH32V30x/CH32V307VCT6/variant_CH32V307VCT6.cpp b/variants/CH32V30x/CH32V307VCT6/variant_CH32V307VCT6.cpp
index 3a1aae3..a331811 100644
--- a/variants/CH32V30x/CH32V307VCT6/variant_CH32V307VCT6.cpp
+++ b/variants/CH32V30x/CH32V307VCT6/variant_CH32V307VCT6.cpp
@@ -30,9 +30,9 @@ const PinName digitalPin[] = {
   PA_8,   //D8   
   PA_7,   //D9      SPI_MOSI    TIM8_CH1N  TIM3_CH2  
   PA_6,   //D10     SPI1_MISO  
-  PB_5,   //D11                 TIM3_CH2_2 TIM10_CH3_1  
-  PB_8,   //D12                 TIM4_CH3 TIM10_CH1 TIM8_CH3_1
-  PB_9,   //D13                  
+  PB_5,   //D11                 TIM3_CH2_2 TIM10_CH3_1 SPI3_MOSI
+  PB_8,   //D12                 TIM4_CH3 TIM10_CH1 TIM8_CH3_1 SDIO_D4
+  PB_9,   //D13                 SDIO_D5
   PB_1,   //D14                 TIM3_CH4 TIM8_CH3N TIM1_CH3N_1    TIM3_CH4_2 TIM9_CH2N_1 
   PB_0,   //D15                 TIM3_CH3 TIM8_CH2N TIM1_CH2N_1    TIM3_CH3_2 TIM9_CH1N_1 
   PB_12,  //D16    SPI2_NSS
@@ -40,7 +40,18 @@ const PinName digitalPin[] = {
   PB_14,  //D18    SPI2_MISO 
   PB_13,  //D19    SPI2_SCK 
   PB_11,  //D20    I2C2_SDA
-  PB_10   //D21    I2C2_SCL
+  PB_10,  //D21    I2C2_SCL
+  PA_15,  //D22    SPI3_NSS
+  PB_4,   //D23    SPI3_MISO
+  PB_3,   //D24    SPI3_SCK
+  PC_8,   //D25    SDIO_D0
+  PC_9,   //D26    SDIO_D1
+  PC_10,  //D27    SDIO_D2
+  PC_11,  //D28    SDIO_D3
+  PC_6,   //D29    SDIO_D6
+  PC_7,   //D30    SDIO_D7
+  PC_12,  //D31    SDIO_CK
+  PD_2    //D32    SDIO_CMD
 };
 
 // Analog (Ax) pin number array
diff --git a/variants/CH32V30x/CH32V307VCT6/variant_CH32V307VCT6.h b/variants/CH32V30x/CH32V307VCT6/variant_CH32V307VCT6.h
index be69f44..cf31436 100644
--- a/variants/CH32V30x/CH32V307VCT6/variant_CH32V307VCT6.h
+++ b/variants/CH32V30x/CH32V307VCT6/variant_CH32V307VCT6.h
@@ -43,7 +43,18 @@
 #define PB14                    18
 #define PB13                    19
 #define PB11                    20
-#define PB10                    21 
+#define PB10                    21
+#define PA15                    22
+#define PB4                     23
+#define PB3                     24
+#define PC8                     25
+#define PC9                     26
+#define PC10                    27
+#define PC11                    28
+#define PC6                     29
+#define PC7                     30
+#define PC12                    31
+#define PD2                     32
 
 
 // Alternate pins number
@@ -60,7 +71,7 @@
 
 
 
-#define NUM_DIGITAL_PINS        22
+#define NUM_DIGITAL_PINS        33
 #define NUM_ANALOG_INPUTS       6
 // #define ADC_CTLR_ADCAL          
 #define ADC_RESOLUTION          12