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Layout of the connectors

This section introduces the layout of connectors and switch of a CHIRIMEN board computer.

Layout of connectors

chirimen_board_front

chirimen_board_back

  1. USB OTG
    It is a USB port of MicroUSB Type B used to connect the host computer for a development.
  2. Micro HDMI type video connector
    It is a connector for connecting a HDMI video monitor.
  3. USB UART
    This connector is not used in many cases. The signal converted into USB from the UARTx port which SoC carries is outputted here.
  4. 5V power in
    It is a power supply connector of 5V with external diameter of 2.5mm.
  5. USB HOST
    It is a USB Type A port for connecting a network adapter, a pointing device, etc.
  6. Recover mode switch
    It is a switch mainly used for updating an OS.
  7. CN1 (Connector1)
    It is a multi use input-and-output-terminal group of the through hole where signals, such as GPIO, I2C, universal synchronous-asynchronous receiver-transmitter and SPI were collected. Refer to the next chapter for the signal layout of this connector.
  8. CN2 (Connector2)
    It is another multi use input and output terminal group.
  9. Micro SD Slot
    It is a MicroSD slot. It is not supported by OS as of February, 2016.

Pinout of multiuse I/O terminals

Multiuse I/O (CN1 and CN2) is

If you have not soldered any pins onto a CHIRIMEN yet, a jumper wire for Through Hole (e.g. TTW-200 ) is recommended for test use.

Note: Currently UART, SPI and PWM are re-assigned to GPIO.

  CN1 (Connector1)    
Number Description (sysfs name) Drive Pull up/down
1 GND N/A N/A
2 I2C-2 SDA 8mA UP
3 I2C-2 SCL 8mA UP
4 GPIO-3 D3 (gpio283) 8mA UP
5 GPIO-3 D4 (gpio284) 8mA DOWN
6 ADC-0 in N/A N/A
7 GPIO-1 A4 (gpio196) 8mA UP
8 GPIO-1 A5 (gpio197) 8mA DOWN
9 GPIO-1 A6 (gpio198) 8mA UP
10 GPIO-1 A7 (gpio199) 8mA UP
11 GPIO-1 C4 (gpio244) 8mA DOWN
12 GPIO-1 C3 (gpio243) 4mA DOWN
13 GPIO-1 C6 (gpio246) 8mA DOWN
14 GPIO-1 C5 (gpio245) 8mA DOWN
15 GND N/A N/A
16 VCC 3.3V N/A N/A
17 VCC 3.3V N/A N/A
18 VCC 5V N/A N/A
  CN2 (Connector2)    
Number Description (sysfs name) Drive Pull up/down
1 GND N/A N/A
2 GND N/A N/A
3 GND N/A N/A
4 GND N/A N/A
5 Audio L out N/A N/A
6 Audio R out N/A N/A
7 Audio L in N/A N/A
8 Audio R in N/A N/A
9 Audio GND N/A N/A
10 GPIO-0 A3 (gpio163) 8mA DOWN
11 I2C-0 SCL 8mA UP
12 I2C-0 SDA 8mA UP
13 GPIO-1 A1 (gpio193) 8mA DOWN
14 GPIO-1 A0 (gpio192) 8mA UP
15 GPIO-6 A1 (gpio353) 8mA UP
16 Power ON N/A N/A
17 GND N/A N/A
18 VSYS 5V N/A N/A

Please see also the below link.