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OLIMEX© 2015
A10-OLinuXino-LIME user's manual
CHAPTER 6: CONNECTORS AND PINOUT
6. Introduction to the chapter
In this chapter are presented the connectors that can be found on the board all together with their
pinout and notes about them. Jumpers functions are described. Notes and info on specific
peripherals are presented. Notes regarding the interfaces are given.
6.1 Communication with LIME
The direct communication method is via the serial interface. Through male UART0 connector
capable of delivering some information on the COM port of your computer – and then use your
favorite terminal program (puTTy, teraterm, etc) to receive the data/send commands. You can use
USB-SERIAL-CABLE-F with the UART0 interface allowing you to connect to a personal
computer with a free USB port.
Note that the levels at board's UART0 are in CMOS level and you would need a MAX232
convertor to bring them to TTL one!
It is highly recommended to own a USB-SERIAL-CABLE-F (or similar product) at hand when
debugging – the video output is not always reliable and if you set wrong display settings you might
be unable to recover the settings without a proper UART0 connection.
The more indirect ways of communicating with the board are via peripheral devices – mouse and
keyboard, via a touch screen LCD that is connected on LCD_CON connector and others.
6.1.1 UART0 interface
The UART0 interface might be used for serial communication between the board and a personal
computer by default. In case of video output problem a cable might provide needed feedback and
greatly reduce the efforts needed to repair the board or to adjust the software setting.
Note that by default only UART0 is defined as a port suitable for serial debug. You can use our
USB-SERIAL-CABLE-F for debugging.
Consider table below when connecting the USB-SERIAL-CABLE-F according to the wire color
code. The RX line of the cable (GREEN wire) should go to TX line of the target board; the TX line
of the cable (RED wire) should go to the RX line of the target board. The BLUE wire should go to
the target's GND line.
UART0
Pin # Signal name
Processor pin
1 UART0-TX
A7
2 UART0-RX
B7
3 GND
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