5 serial console, 6 digital connectors (s/pdif), 7 headphone connector – Kontron KTT30-mITX User Manual
Page 25: Serial console, Digital connectors (s/pdif), Headphone connector, Ktt30/mitx users guide
KTD-N0857-A
Page 22
Pin Connectors
KTT30/mITX Users Guide
8.5
Serial Console
Most operating systems have a defined serial console. The KTT30/mITX board uses the first serial port
(UARTA/ UART1) on connector J3 for this purpose. Normally the serial console needs only three signal lines
(TXD, RXD and GND). 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 USB keyboard and 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
8.6
Digital Connectors (S/PDIF)
The digital audio interface is available through the connectors J26 and J31 (2 pins).
8.7
Headphone Connector
The headphone interface is available through the connector J32 (4 pins).
Header
Pin
Signal
Type
1
GND
PWR
2
HPOUT-L
AO
3
GND
PWR
4
HPOUT-R
AO
Header
Pin
J26
J31
Type
1
SPDIF_OUT
SPDIF_IN
O resp. I (J31)-3.3
2
GND
GND
PWR
1