JS7688

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Specification

  • CPU 580Mhz
  • FLASH / RAM: 32MB / DDR2 128MB (specs for HLK, linkit smart 7688) 16MB / 128MB (wooya)
  • 2.4G 150Mbps Wifi
  • 3.3V about 100mA
  • 5x ethernet 10/100M, 1x USB 2.0
  • SPI / SDxc / 3xUART /GPIO/PWM/I2S/SPIS/USB_HOST/I2C
  • Openwrt
  • Application: router, 3G-to-Wifi, Wifi-camera, remote-monitor, wireless-speaker, wifi-to-ethernet, wifi-NAS ..


ED7688

Pin Function 0 Function 1 Function 2 Function 3 Remarks

  • 1 GND N/A N/A N/A main power ground
  • 2 GND N/A N/A N/A main power ground
  • 3 GND N/A N/A N/A main power ground
  • 4 VDD3V3 N/A N/A N/A Main Power Supply DC 3.3V Input
  • 5 VDD3V3 N/A N/A N/A Main Power Supply DC 3.3V Input
  • 6 VDD3V3 N/A N/A N/A Main Power DC 3.3V Input
  • 7 REF_CLK_O GPIO37 N/A N/A Default as GPIO, SYSTEM_LED
  • 8 WDT_RST_N GPIO38 N/A N/A Default as GPIO, USER_KEY1
  • 9 EPHY_LED4_N_JTRST_N GPIO39 w_utif_n[6] jtrstn_n defaults as GPIO, WLAN_LED
  • 10 EPHY_LED3_N_JTCLK GPIO40 w_utif_n[7] jtclk_n defaults as GPIO, LAN2_LED
  • 11 EPHY_LED2_N_JTMS GPIO41 w_utif_n[8] jtms_n defaults as GPIO, USER_KEY2
  • 12 EPHY_LED1_N_JTDI GPIO42 w_utif_n[9] jtdi_n defaults as GPIO, LAN1_LED
  • 13 EPHY_LED0_N_JTDO GPIO43 N/A jtdo_n Default as GPIO, WAN_LED
  • 14 WLED_N GPIO44 N/A N/A Default as GPIO, RESET_FN_KEY
  • 15 GND N/A N/A N/A Ground
  • 16 UART_TXD1 GPIO45 PWM_CH0 antsel[1] Internal 10K pull-up
  • Blocked to 3.3V, the default is UART_TXD1
  • 17 UART_RXD1 GPIO46 PWM_CH1 antsel[0] defaults to UART_RXD1
  • 18 I2S_SDI GPIO0 PCMDRX antsel[5] defaults to I2S_SDI
  • 19 I2S_SDO GPIO1 PCMDTX antsel[4] Internal 10K pull-down resistor to ground, defaults to I2S_SDO
  • 20 I2S_WS GPIO2 PCMCLK antsel[3] defaults to I2S_WS
  • 21 I2S_CLK GPIO3 PCMFS antsel[2] defaults to I2S_CLK
  • 22 I2C_SCLK GPIO4 sutif_txd ext_bgclk defaults to I2C_SCLK
  • 23 I2C_SD GPIO5 sutif_rxd N/A defaults to I2C_SD
  • 24 SPI_CS1 GPIO6 REF_CLK_O N/A Internally connected 10K pull-down resistor to ground, defaults to SPI_CS1
  • 25 VDD3V3_PROG N/A N/A N/A External flash writer power supply DC 3.3V input pin. Note: It only needs to be connected when connecting to an external flash writer. Generally, it is suspended.
  • 26 SPI_CLK GPIO7 N/A N/A Internal 10K pull-up resistor to 3.3V, default as SPI_CLK
  • 27 GND N/A N/A N/A Ground
  • 28 SPI_MOSI GPIO8 N/A N/A Internally connected 10K pull-down resistor to ground, the default is SPI_MOSI
  • 29 SPI_MISO GPIO9 N/A N/A defaults to SPI_MISO
  • 30 GPIO11 GPIO11 REF_CLK_O PERST_N defaults to REF_CLK_O
  • 31 SPI_CS0 GPIO10 N/A N/A defaults to SPI_CS0, occupied by system SPI flash, can be used for flash programming
  • 32 UART_RXD0 GPIO13 N/A N/A defaults to UART_RXD0, system tuning Trial serial port
  • 33 UART_TXD0 GPIO12 N/A N/A Internal 10K pull-down resistor to ground, default to UART_TXD0, system debug serial port
  • 34 MDI_R_P0_P N/A N/A N/A Ethernet port 0 Receive positive end
  • 35 GND N/A N/A N/A Ground
  • 36 GND N/A N/A N/A Ground
  • 37 MDI_R_P0_N N/A N/A N/A Ethernet port 0 Receive negative terminal
  • 38 MDI_T_P0_N N/A N/A N/A Ethernet port 0 Send negative terminal
  • 39 MDI_T_P0_P N/A N/A N/A Ethernet port 0 Send positive terminal
  • IoT gateway mode IoT device mode (IOT device)
  • 40 MDI_T_P1_N SPIS_CLK GPIO15 w_utif[1] PWM_CH1 defaults to PWM_CH1
  • 41 MDI_T_P1_P SPIS_CS GPIO14 w_utif[0] PWM_CH0 defaults to PWM_CH0
  • 42 MDI_R_P1_N SPIS_MOSI GPIO17 w_utif[3] UART_RXD2 defaults to UART_RXD2
  • 43 MDI_R_P1_P SPIS_MISO GPIO16 w_utif[2] UART_TXD2 defaults to UART_TXD2
  • 44 MDI_R_P2_N PWM_CH1 GPIO19 w_utif[5] SD_D6 defaults to GPIO
  • 45 MDI_R_P2_P PWM_CH0 GPIO18 w_utif[4] SD_D7 defaults to GPIO
  • 46 GND N/A N/A N/A Ground
  • 47 MDI_T_P2_P UART_TXD2 GPIO20 PWM_CH2 SD_D5 defaults to PWM_CH2
  • 48 MDI_T_P2_N UART_RXD2 GPIO21 PWM_CH3 SD_D4 defaults to PWM_CH3
  • 49 MDI_T_P3_P SD_WP GPIO22 w_utif[10] w_dbgin defaults to SD_WP
  • 50 MDI_T_P3_N SD_CD GPIO23 w_utif[11] w_dbgack defaults to SD_CD
  • 51 GND N/A N/A N/A GND
  • 52 MDI_R_P3_N SD_D0 GPIO25 w_utif[13] w_jtdi defaults to SD_D0
  • 53 MDI_R_P3_P SD_D1 GPIO24 w_utif[12] w_jtclk defaults to SD_D1
  • 54 GND N/A N/A N/A GND
  • 55 MDI_R_P4_P SD_CLK GPIO26 w_utif[14] w_jtdo defaults to SD_CLK
  • 56 MDI_R_P4_N SD_CMD GPIO27 w_utif[15] dbg_uart_t defaults to SD_CMD
  • 57 MDI_T_P4_P SD_D3 GPIO28 w_utif[16] w_jtms defaults to SD_D3
  • 58 MDI_T_P4_N SD_D2 GPIO29 w_utif[17] w_jtrst_n defaults to SD_D2
  • 59 GND N/A N/A N/A GND
  • 60 USB_N N/A N/A N/A USB Negative
  • 61 USB_P N/A N/A N/A USB Positive
  • Note: When the chip is in the “IoT Gateway Mode”, the pin function multiplexed with the relevant network port is not available. At this time, these pins are Ethernet functions. When they are in the “Internet of Things device mode”, these multiplexed pins are The Ethernet function is not available and other alternate function functions are available.

Perpherial Schematic