/*64Kbytes Block Erase;
Send Data:0xD8,AddrH,AddrM,AddrL;
*/
void MX25L_Flash_BlockErase_64KB(uint32_t Block64KBAddr)
{
        MX25L_Flash_WriteEnable();
        MX25L_Flash_WaitIdle();
       
        uint8_t data=MX25L_BlockErase_64KB;                       
        HAL_GPIO_WritePin(GPIOC,GPIO_PIN_8,GPIO_PIN_RESET);
        HAL_SPI_Transmit(&hspi6,&data,sizeof(data),1000);

        Block64KBAddr=Block64KBAddr*4096*16;
        uint8_t Address=(Block64KBAddr>>16);
        HAL_SPI_Transmit(&hspi6,&Address,sizeof(Address),1000);
        Address=(Block64KBAddr>>8);
        HAL_SPI_Transmit(&hspi6,&Address,sizeof(Address),1000);
        Address=Block64KBAddr;
        HAL_SPI_Transmit(&hspi6,&Address,sizeof(Address),1000);

        HAL_GPIO_WritePin(GPIOC,GPIO_PIN_8,GPIO_PIN_SET);
       
        MX25L_Flash_WaitIdle();
}

调试OK了，有问题请指正；