Manual

KTD-S0051-D Page 24 Serial Interface
KTAM3874/pITX User's Guide
B
A
Y
Z
Half Duplex RS-485
1
Rx
Tx
J1300
I
S
L3330
11
11
1
0
GP3[16] GP3[17]
RTS
Mode
Receive
Transmit
10.5 Serial Console
Most operating systems have a defined serial console. The KTAM3874/pITX board uses the first serial port
(UART0) on connector J1304 for this purpose. The serial port is assigned to the environment variables
stdin, stdout and stderr. If you use U-Boot as bootloader you can interact with U-Boot via a standard
terminal program on a desktop computer. The following overview shows the default serial settings:

Baudrate 115 kBaud

Data bits 8

Stop bits 1

Parity No
For development purposes it can be useful to download U-Boot via the serial interface. This feature is
enabled if you set a jumper on pin header J1101. For further information see the Software Guide chapter
'Bootloader Download'.