Technical Reference Guide
Compaq Deskpro 4000 and 6000 Personal Computers
featuring the Pentium II Processor
First Edition -October 1997
5-15
5.4.2 IrDA INTERFACE
The Infra Red interface complies with the Infrared Data Association (IrDA) data link protocol.
Features of the IrDA interface include:
♦ Sharp-IR with selectable internal or external modulation/demodulation
♦ IrDA 1.0 SIR support up to 115.2 Kbps
♦ Full duplex infrared capability for diagnostics
♦ Automatic or manual transceiver configuration
The interface includes an IrDA dongle assembly that contains the infrared transceiver. The 8-pin
mini-DIN connector (to which the dongle attaches) is shown as follows and the pinout is listed in
Table 5-10.
Figure 5–5.
IrDA Interface Connector (Female mini-DIN-Type as viewed from rear of chassis)
Table 5–10.
IrDA DIN Connector Pinout
Table 5-10.
IrDA DIN Connector Pinout
Pin Signal Description Pin Signal Description
1 TX Transmit data 5 RSVD Reserved
2 RX Receive data 6 RSVD Reserved
3 GND Ground 7 DETECT Detect Dongle
4 Vcc +5 VDC power 8 RSVD Reserved
The supplied IrDA dongle provides the actual infrared interface with a compliant peripheral
device. The dongle uses a high speed IR LED as the transmitter and a high speed IR photo diode
as the receiver. These devices obtain power from the system unit. The peripheral device (or it’s
infrared interface) should be placed no more than one meter from the dongle and no more than
15 degrees off the viewing angle of the dongle’s infrared diodes.
8 7 6
5 4 3
2 1
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