SDK-AC4424-10 Laird Technologies, SDK-AC4424-10 Datasheet - Page 13

• Manufacturer Part Number: SDK-AC4424-10
• Description: KIT DESIGN FOR AC4424-10
• Manufacturer: Laird Technologies
• Series: AeroCommr
• Type: Transceiverr

Specifications of SDK-AC4424-10

• Frequency: 2.4GHz
• For Use With/related Products: AC4424-10
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Developer Kit User’s Manual
2.3 I
The SDK serial board has been designed to interface to RS-485 equipment. If such operation is
desired, the COMM Select jumper should be set to RS485 Enable. The RS-485 circuitry used by
the SDK board has been specially designed to negate the requirement for a DE/RE signal. Thus,
the receiver is always enabled unless the transceiver has something to send to the OEM Host.
The OEM must ensure that the OEM Host does not send data at the same time as the transceiver;
otherwise a RS-485 contention will occur because the RS-485 hardware is half duplex.
2.4 P
The serial board employs a National LM2940 linear regulator to regulate the incoming voltage to 5VDC.
Due to heat dissipation limitations and current requirements, a maximum of 10VDC should be present at
connector J4. A minimum of 5.5V should also be present at the connector.
3. Software
3.1 USB S
Disconnect the SDK hardware from the USB port of the PC (if it is currently connected) and close any
open USB driver installation menus. Locate the software download section of the SDK CD and install the
USB drivers.
3.2 SDK S
Locate the software download section on the SDK CD and install the development kit software. The first
time the software is run, the following message will be displayed:
10/2/05
NTERFACING THE
RS-485 Pin
OWER
B INVERT
A TRUE
Name
GND
+5V
OFTWARE
OFTWARE
R
EQUIREMENTS
This is regulated 5V output from the serial board for general purpose
The inverted form of the serial data (an exact inversion of A TRUE).
I
I
SDK B
NSTALLATION
NSTALLATION
The non-inverted form of the serial data. This pin is at rest High.
use. A maximum of 100mA should be drawn through this node.
Table 7 – RS-485 Header Pins
OARD TO
RS-485 E
This pin is at rest Low.
Description
QUIPMENT
GND
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