ETRX3DVKA357 Telegesis Ltd, ETRX3DVKA357 Datasheet - Page 11

• Manufacturer Part Number: ETRX3DVKA357
• Description: KIT DEVELOPMENT FOR ETRX357
• Manufacturer: Telegesis Ltd
• Type: ZigBit™r

Specifications of ETRX3DVKA357

• Frequency: 2.4GHz
• Kit Contents: 3x ETRX35xDV Development Boards, 3x USB Cables, 2x ETRX35x On Carrier Boards, 2x ETRX35xHR Boards
• Mcu Supported Families: ETRX3
• Silicon Manufacturer: Telegesis
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ETRX357
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 920-1009; ETRX2DVK357

Power supply jumpers: links must be inserted at JP3 and JP6 according to the DC supply feed.
JP3 can be left connected at all time, but it disconnects the serial interface lines and prevents
power drain through them when the serial (USB) interface is not used. This will minimise the
current drain from a battery and produce a more accurate reading of the current consumption.
It permissible to attach a USB connection while the board is powered from a battery or external
supply.
There are three options:
Insert JP3. Connect the centre
pin of JP6 to ‘Ext’.
Instead of a shorting link, a current meter can be inserted at JP6 to monitor the power
consumption.
9.2 Development Board Sensors
The board’s temperature sensor is a National Semiconductor LM61 which has an offset of 600mV
and a sensitivity of 10mV/deg. Hence for example 0°C give 600mV and 20° gives 800mV.
The light sensor is an Avago APDS 9005; it indicates ambient light level but is not suitable for
accurate measurements.
©2010 Telegesis (UK) Ltd
USB power
Optionally, omit JP3. Connect the
centre pin of JP6 to ‘Ext’.
External power through the X2
Figure 7. Power feed options
socket
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ETRX35xDVK Product Manual (Rev 1.01)
Optionally, omit JP3. Connect the
centre pin of JP6 to ‘Batt’.
ETRX35x Development Kit
Battery power