1,   CPU: STM32103VET(MAX to 72MHz) 
   Flash: 512KB
    SRAM: 64KB

2, RS232:
  USART1_TX  -- PA9 
  USART1_RX  -- PA10

3, RS485
  USART2_TX  -- PA3
  USART2_RX  -- PA2

4, ENC28J60CSS(SPI ethernet):
  Eth0_INT   -- PA1 
  SPI1_MISO  -- PA6 
  SPI1_MOSI  -- PA7
  SPI1_SCK   -- PA5
  SPI1_NSS   -- PA4
  LCD_RST    -- PE1

5, CAN
  CAN_TX     -- PB9
  CAN_RX     -- PB8

6, LED
  LED1       -- PB5
  LED2       -- PD6
  LED3       -- PD3

7, Button
  KEY1       -- PC5
  KEY2       -- PC2
  KEY3       -- PC3

8, SST25VF016B
  SPI1_MISO  -- PA6
  SPI1_MOSI  -- PA7
  SPI1_CLK   -- PA5
  SPI1_CS2   -- PC4