OLIMEX© 2013
A10S-OLinuXino-MICRO user's manual
overwrite the original one).
Those images , the software required and further instructions might be found at the wiki page:
https://www.olimex.com/wiki/A10S-OLinuXino-MICRO
.
6.1.2 UART0, UART1, UEXT interface
The UART0 might be used for COM communication without any modification. UART1 and UEXT
interfaces might also be configured for such a communication. However, the UEXT is typically
used for connecting additional modules.
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. UEXT and UART1 are NOT defined by default.
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
UART1
Pin # Signal name
Processor pin
Pin # Signal name
Processor pin
1
3.3V
-
1
3.3V
-
2
UART0-TX
G3
2
SD1-CMD/UART1_TX
A11
3
UART0-RX
G4
3
SD1-CLK/UART1_RX
B12
4
GND
-
4
GND
-
UEXT
Pin #
Signal name
Pin # Signal name
1
3.3V
6
TWI2-SDA
2
GND
7
SPI2-MISO/JTAG-DI0
3
UART2-TX
8
SPI2-MOSI/JTAG-DO0
4
UART2-RX
9
SPI2-CLK/JTAG-CKO
5
TWI2-SCK
10
SPI2-CS0/JTAG-MS0
The UEXT connector is used for the Olimex's UEXT modules (usually boards with MOD- prefix in
their commercial names).
For more information on UEXT please visit:
https://www.olimex.com/Products/Modules/UEXT/resources/UEXT.pdf
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