Dacu
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Contents
- 1 Introduction
- 2 Block Diagram
- 3 Mechanicals
- 4 Available options
- 5 Connectors pinout
- 5.1 Power supply
- 5.2 CPU module connectors – J1, J2
- 5.3 UART1 - J4
- 5.4 UART2/CAN - J5
- 5.5 UART3 - J25
- 5.6 Ethernet port - J6
- 5.7 LCD LVDS connector - J8
- 5.8 LCD Ziff connecor - J7
- 5.9 Touch screen connecor - J28
- 5.10 MicroSD slot - J12
- 5.11 SDIO slot (DWM module) - J14
- 5.12 USB ports - J15
- 5.13 I2C bus - J18
- 5.14 GPIO - J19
- 5.15 SPI bus - J20
- 5.16 Audio - J21
- 5.17 JTAG - J16
- 6 Versions
- 7 Layout
- 8 Mechanical
Introduction[edit | edit source]
Dacu is a carrier board that can host various DAVE Embedded Systems SOMs, like, for example, the Lizard CPU module.
 Please note that DACU supports several BOM variants in order to mate with different SOMs or evaluation boards. |
Dacu's system specifications are the following:
| Supported SOMs | Axel Ultra Axel Lite Diva Lizard |
| Power | 12-24 V |
| Serial Ports | 1x UART RS232 on DB9 1x UART (RS232/RS422/RS485) or CAN on DB9 (hardware mount options) 1x UART RS232 on pin strip (debug port) |
| Ethernet | 1x Fast Ethernet on RJ45 connector |
| Display | 7" 800x480 LVDS |
| Storage | 1x microSD slot |
| USB | 2x USB 2.0 ports |
| Audio | UDA1345 codec |
| Buses | I2C SPI |
| Other | On board touch controller Optional Wi-Fi module GPIOs |
Block Diagram[edit | edit source]
The following picture shows block diagram of the Dacu carrier board (the version for the Lizard SOM):
Mechanicals[edit | edit source]
The following picture shows the mechanical layout of Dacu:
Available options[edit | edit source]
RS232/RS485/RS422 or CAN[edit | edit source]
Male or female DB9 connector[edit | edit source]
Connectors pinout[edit | edit source]
The following section describes the on-board connectors and their pinout.
Power supply[edit | edit source]
Power is provided through the JP2 DC Power Jack. Power voltage range is [12-24 V]
CPU module connectors – J1, J2[edit | edit source]
J1 and J2 are the 140-pin mating connectors for the hosted SOM.
UART1 - J4[edit | edit source]
J4 is a standard DB9 connector for the RS232 four-wires UART1 port. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1, 4, 6, 9 | N.A. | N.A. | Connected to protection diode array |
| 2 | UART_EXT_RX | Receive line | |
| 3 | UART_EXT_TX | Transmit line | |
| 5 | DGND | Ground | |
| 7 | UART_EXT_RTS | Request To Send line | |
| 8 | UART_EXT_CTS | Clear To Send line |
UART2/CAN - J5[edit | edit source]
J5 is a standard DB9 male connector for the configurable UART/CAN port. The board provides some hardware mount options for the selection of the UART mode (RS232/RS422/RS485 with auto-direction) or the CAN mode. The board default configuration provides the CAN interface on this port, while the RS232/RS422/RS485 interface is provided as an option to customers who choose the alternative configuration.
Please note that this port can be used to connect a Bluetooth serial adapter powered by the 5V_BT signal.
The following table reports the connector's pinout:
| Pin# | Pin name | RS232 mode | RS422 mode | RS485 mode | CAN mode | Notes |
|---|---|---|---|---|---|---|
| 1 | N.A./Reserved | Not connected | Not connected | Not connected | Reserved | |
| 2 | UART2_A/CAN_M | UART2 rx line | Not connected | Not connected | CAN bus low signal | |
| 3 | UART2_Y/CAN_GND | UART2 tx line | Inverting driver output | Inverting driver output | CAN bus GND | |
| 4 | N.A./Reserved | Not connected | Not connected | Not connected | Reserved | |
| 5 | DGND/CAN_SHIELD | Ground | Ground | Ground | CAN bus shield (Optional) | |
| 6 | N.A./GND | Not connected | Not connected | Not connected | Ground (Optional) | |
| 7 | UART2_Z/CAN_P | UART2 Request To Send | Noninverting driver output | Noninverting driver output | CAN bus high signal | |
| 8 | UART2_B/Reserved | UART2 Clear To Send | Not connected | Not connected | Reserved | |
| 9 | 5V_BT/CAN_V+ | 5V for bluetooth | 5V for bluetooth | 5V for bluetooth | CAN bus Power (Optional) |
Configuration Jumpers J26 e J27[edit | edit source]
When the board is configured to provide the UART2 interface through the J5 connector, the J26 and J27 jumpers are used to configure the UART mode, as reported below:
| Jumper | RS232 mode | RS422 mode | RS485 mode |
|---|---|---|---|
| 1-3 | open | open | closed |
| 5-7 | open | closed | open |
| 9-11 | open | closed | open |
| 2-4 | open | open | closed |
| 6-8 | open | closed | closed |
| 10-12 | open | closed | closed |
| 13-15 | open | open | closed |
| 14-16 | open | open | closed |
UART3 - J25[edit | edit source]
J25 is a 10 pin (5x2x2.54mm) header connector. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1, 2, 4, 6, 7, 8, 10 | N.A. | N.C. | Not connected |
| 3 | UART3_RX | Uart Receive line | |
| 5 | UART3_TX | Uart Transmit line | |
| 9 | DGND | Ground |
Ethernet port - J6[edit | edit source]
J6 is a standard RJ45 connectors connected to the Lizard integrated ethernet controller and PHY.
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1 | ETH_CTTD | Center Tap TX | |
| 2 | ETH_TX+ | Eth transmit data + | |
| 3 | ETH_TX- | Eth transmit data - | |
| 4 | ETH_RX+ | Eth receive data + | |
| 5 | ETH_RX- | Eth receive data - | |
| 6 | ETH_CTRD | Center Tap RX | |
| 7 | DGND | Ground | |
| 8 | ETH_LED2 | Eth speed led | |
| 9 | DGND | Ground | |
| 10 | ETH_LED1 | Eth activity led |
LCD LVDS connector - J8[edit | edit source]
J8 is a Hirose (cod. DF13A-20DP-1.25V) double row 1.25mm pitch miniature crimping connector. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1, 2 | 3.3V_LCD | 3.3 V | |
| 3, 4, 7, 10, 13, 16, 19 | DGND | Ground | |
| 5 | LCD_LVDS_D0- | LVDS Data 0 - | |
| 6 | LCD_LVDS_D0+ | LVDS Data 0 + | |
| 8 | LCD_LVDS_D1- | LVDS Data 1 - | |
| 9 | LCD_LVDS_D1+ | LVDS Data 1 + | |
| 11 | LCD_LVDS_D2- | LVDS Data 2 - | |
| 12 | LCD_LVDS_D2+ | LVDS Data 2 + | |
| 14 | LCD_LVDS_CLK- | LVDS clock - | |
| 15 | LCD_LVDS_CLK+ | LVDS clock + | |
| 17 | LCD_P17 | Backlight PWM | Connected to LCD_BKLT_PWM |
| 18 | LCD_P18 | Connected to 5V_LCD | |
| 20 | LCD_P20 | Connected to ground | |
| 21, 22 | LVDS_SHIELD | LVDS shield |
LCD Ziff connecor - J7[edit | edit source]
J7 is an optional connector for an Ampire AM-800480STMQW-TB0 7" 800x480 display. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1, 2, 9, 13, 17, 21, 25, 39, 40 | DGND | Ground | |
| 3 | LCD_PCLK | LCD Pixel clock | |
| 4 | LCD_IRQ | ||
| 5 | TSC_YP | ||
| 6 | LCD_R0 | ||
| 7 | LCD_R1 | ||
| 8 | LCD_R2 | ||
| 10 | LCD_R3 | ||
| 11 | LCD_R4 | ||
| 12 | LCD_R5 | ||
| 14 | LCD_G0 | ||
| 15 | LCD_G1 | ||
| 16 | LCD_G2 | ||
| 18 | LCD_G3 | ||
| 19 | LCD_G4 | ||
| 20 | LCD_G5 | ||
| 22 | LCD_B0 | ||
| 23 | LCD_B1 | ||
| 24 | LCD_B2 | ||
| 26 | LCD_B3 | ||
| 27 | LCD_B4 | ||
| 28 | LCD_B5 | ||
| 29 | TSC_YM | ||
| 30 | TSC_XM | ||
| 31 | TSC_XP | ||
| 32 | LCD_DE | ||
| 33, 34 | 3.3V_LCD | ||
| 35, 36, 37 | 5V_LCD | ||
| 38 | LCD_BKLT_PWM |
Touch screen connecor - J28[edit | edit source]
J28 is a 1.0mm pitch 4-pin ZIF connector. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1 | TSC_YP | Touch controller Y+ | |
| 2 | TSC_XP | Touch controller X+ | |
| 3 | TSC_YM | Touch controller Y- | |
| 4 | TSC_XM | Touch controller X- |
MicroSD slot - J12[edit | edit source]
J12 is a Micro-SD card header. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1 | MMC1_DAT2 | ||
| 2 | MMC1_DAT3 | ||
| 3 | MMC1_CMD | ||
| 4 | MMC_3.3V | ||
| 5 | MMC1_CLK | ||
| 6 | DGND | ||
| 7 | MMC1_DAT0 | ||
| 8 | MMC1_DAT1 | ||
| 9, 11 | SD_SHIELD | ||
| 10, 12 | MMC1_DAT5 |
SDIO slot (DWM module) - J14[edit | edit source]
J14 is a Molex dual row 0.50mm pitch SlimStack™ receptacle. This connector is dedicated to the DWM add-on module.The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1, 2 | 5V | ||
| 3, 4 | 3.3V | ||
| 5, 6, 9, 10, 19 | DGND | ||
| 7 | MMC2_CMD | ||
| 8 | MMC2_CLK | ||
| 11 | MMC2_DAT0 | ||
| 12, 14, 16, 18, 20, 22 | N.C. | Not connected | |
| 13 | MMC2_DAT1 | ||
| 15 | MMC2_DAT2 | ||
| 17 | MMC2_DAT3 | ||
| 21 | UART2_RX | Mount option | |
| 23 | UART2_CTS | Mount option | |
| 24 | BT_F5 | Connected to DSS_DATA20/DSI_DY1 | |
| 25 | UART2_TX | Mount option | |
| 26 | BT_F2 | Connected to DSS_DATA21/DSI_DX1 | |
| 27 | UART2_RTS | Mount option | |
| 28 | WIFI_IRQ | Connected to DSS_DATA22/DSI_DY2 | |
| 29 | BT_EN | Connected to DSS_DATA19/DSI_DX0 | |
| 30 | WIFI_EN | Connected to DSS_DATA23/DSI_DX2 |
USB ports - J15[edit | edit source]
J15 is a stacked, dual port USB Type A connector.
USB port 0 (high speed)[edit | edit source]
USB port 0 is mapped on the lower USB connector. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| B1 | 5V_USBH_0 | 5V | |
| B2 | USB0_DM | USB0 Data - | |
| B3 | USB0_DP | USB0 Data + | |
| B4 | DGND_USBH_0 | Ground |
USB port 1 (full speed)[edit | edit source]
USB port 1 is mapped on the higher USB connector. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| A1 | 5V_USBH_1 | 5V | |
| A2 | USBM1 | USB0 Data - | |
| A3 | USBP1 | USB1 Data + | |
| A4 | DGND_USBH_1 | Ground |
I2C bus - J18[edit | edit source]
J18 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1, 5 | DGND | Ground | |
| 4, 8 | 3.3V | 3.3 V | |
| 2 | I2C2_SDA | I2C #2 data | |
| 3 | I2C2_SCL | I2C #2 clock | |
| 6 | I2C3_SDA | I2C #3 data | |
| 7 | I2C3_SCL | I2C #3 clock |
GPIO - J19[edit | edit source]
J19 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1, 8 | DGND | Ground | |
| 2 | MCBSP1_CLKX | GPIO | |
| 3 | MCBSP1_DX | GPIO | |
| 4 | MCBSP1_FSX | GPIO | |
| 5 | MCBSP3_DR | GPIO | |
| 6 | MCBSP3_FSX | GPIO | |
| 7 | MCBSP4_DR | GPIO |
SPI bus - J20[edit | edit source]
J20 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1 | DGND | Ground | |
| 2 | MCSPI1_CLK | SPI1 clock | |
| 3 | MCSPI1_CS0 | SPI1 chip select #0 | |
| 4 | MCSPI1_CS1 | SPI1 chip select #1 | |
| 5 | MCSPI1_CS2 | SPI1 chip select #2 | |
| 6 | MCSPI1_SOMI | SPI1 slave output master input | |
| 7 | MCSPI1_SIMO | SPI1 slave input master output | |
| 8 | 3.3V | 3.3 V |
Audio - J21[edit | edit source]
J21 is a 8-pin 1.25mm pitch vertical header. The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1 | AUD_PW2 | Audio amplifier VO 2 | |
| 2 | AUD_PW1 | Audio amplifier VO 1 | |
| 3, 5, 7 | DGND | Ground | |
| 4 | LINEOUT_R | Audio coded lineout right | |
| 6 | LINEOUT_L | Audio coded lineout left | |
| 8 | MIC_INPUT | Microphone input |
JTAG - J16[edit | edit source]
J16 is a standard 20-pin 2.54mm pitch header connector (bottom side). The following table reports the connector's pinout:
| Pin# | Pin name | Function | Notes |
|---|---|---|---|
| 1, 2 | 3.3V | 3.3 V | |
| 3 | JTAG_TRSTn | ||
| 5 | JTAG_TDI | ||
| 7 | JTAG_TMS | ||
| 9 | JTAG_TCK | ||
| 11 | JTAG_RTCK | ||
| 13 | JTAG_TDO | ||
| 15 | JTAG_RST# | Connected to MRSTn | |
| 4, 6, 8, 10, 12, 14, 16, 18, 20 | DGND | Ground | |
| 17, 19 | N.A. | Not connected |
Versions[edit | edit source]
As stated before, different versions of DACU board exist in order to support several SOMs and evaluation boards.
The following pages provide some additional information (including schematics and BOMs) related to the mating of DACU with the supported SOMs.
