EM357-MOD-RF-T datasheet(40/43 Pages) SILABS

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8-2

EM35x Development Kit User Guide

120-4030-000E

{ {

4} {

0} {0x00} {-22} {0x31} {0x4000} {0x00007186} {0x12}

}

{ {

5} {

0} {0x00} {-22} {0x31} {0x4000} {0x0000DA57} {0x12}

}

{ {

6} {

0} {0x00} {-22} {0x31} {0x4000} {0x00014327} {0x12}

}

{ {

7} {

0} {0x00} {-22} {0x31} {0x4000} {0x0001ABF6} {0x12}

}

{ {

8} {

0} {0x00} {-22} {0x31} {0x4000} {0x000214C6} {0x12}

}

{ {

9} {

0} {0x00} {-22} {0x31} {0x4000} {0x00027D96} {0x12}

}

{ {

10} {

0} {0x00} {-22} {0x31} {0x4000} {0x0002E666} {0x12}

}

{{(rx)} test end}

To end the rx test, press the 'e' key. To reset the rx test statistics, end and restart the rx test.

The test may also be run between an EM357 and an EM250 using the Rangetest application on the EM250. When

using Rangetest, the commands names are "receive" and "transmit."

8.3

Testing Deep Sleep Current

•

Deep sleep current can be easily measured using the Nodetest application running on a Breakout Board.

Deep sleep current can only be measured when power is supplied to the board from a source other than the

ISA3. The buffer logic on the ISA3 consumes extra current which will not allow for accurate measurements.

•

If an ISA3 is connected to the Breakout Board, then the ISA3's Target Power Select Switch should be

switched to EXT (External) so that the ISA3 is not supplying power.

•

Supply power through the USB jack, the DC jack, or the AAA Battery Pack. (The USB jack is recommended

and reviewed in these test steps because it is the simplest.)

•

Rotate the VIN_SELECTOR jumper (J2/J3) on the Breakout Board to the V_REG position (pins 2 and 3). If

power is supplied properly and all four power/LED jumpers (J2/J3, J4, J6, and J7) in the upper left corner

of the board are installed, then only the red V_USB LED and the green V_MOD LED will be illuminated.

•

To properly measure current, remove the V_MOD jumper (J6) from the Breakout Board. This ensures that

the green V_MOD LED is not being driven. If supplying voltage through the J8 battery connector, also

remove J7 so the V_BATT LED DS5 is not driven.

•

Remove the V_MOD_EN jumper (J4) from the Breakout Board to take current measurements. Then, connect

an ammeter in place of the jumper.

•

If using EM35x Breakout Board revision B0 or later, remove the DataFlash jumpers at J33 to isolate the

DataFlash IC from the rest of the circuit.

EM357-MOD-RF-T Datasheet(PDF) 40 Page - Silicon Laboratories

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