KONTRON
CMP/P3 and CMP/C3 User’s Guide
29
IrDA Interface
15.
IRDA INTERFACE
IrDA (named after the standardizing group ”InfraRed Data Association”) defines a standard for
high-speed infrared data transfer over distances of about 1 meter.
15.1
IrDA SIR Mode
This is an operation mode similar to Sharp-IR. The IrDA 1.0 SIR allows serial communication at baud
rates up to 115.2K Baud. The data format is the same as Sharp-IR mode except no parity bit is
needed. Sending a single infrared pulse signals a zero. A one is signaled by not sending a pulse. The
width of each pulse is 3/16ths of a single bit time. The device operation in IrDA 1.0 SIR mode is
similar to the operation in UART. The main difference is that the data transfer is normally performed
in half duplex fashion, and the modem control and status signals are not used. The transfer signals
rout to IRRX and IRTX.
For the infrared feature to be available, you must connect an infrared module to the IrDA connector
and configure the infrared settings in BIOS Setup Utility. The IrDA connector supports the optional
wireless transmitting and receiving infrared module.
15.2
Connector
The IrDA is available through the X2 connector (8 pins).
Header
Pin
Signal Name
Function
1
NC (**)
For internal use only
2
NC (**)
For internal use only
3
IRTX
Infrared transmit (serial data output signal)
4
GND
Ground
5
IRRX
Infrared receive (serial data input signal)
6
VCC (*)
+5V
7
NC (**)
For internal use only
8
NC (**)
For internal use only
The connector with eight positions used on COOLMONSTER/P3 or COOLMONSTER/C3 for connecting
an infrared module is from manufacturer BERG. For mating connector information see Appendix E:
Connector Layout.
Note
:
(*)
To protect external power lines of peripheral devices, make sure that
-- the wires have the right diameter to withstand maximum available current
-- the enclosure of the peripheral device fulfils fire-protection requirements
-- of IEC/EN 60950.
NOTE: (**)
Do not connect anything to these pins!
