Laird BL654 - Other Features; Current Consumption Measurement

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A removable jumper (on J7 and J9) is provided to break the power supply line directly to the module, allowing you to
measure current consumption. For normal operation, the jumper on J7 (and J9) must be fitted (and is fitted by default).
IMPORTANT: To achieve the optimal power consumption of the BL654 series module on the development board, see
the “lp.low.power.deep.sleep.sb” file in the GitHub smartBASIC sample application repository on the
BL654 product page at https://github.com/LairdCP/BL654-Applications
Note: This measures the current consumption of the BL654 series module ONLY.
The current drawn by the BL654 series module can be monitored on the development board. Figure 21 shows the
schematic and location of measuring points on the PCB related to current measurements.
Figure 21: Current measurement schematic and PCB
R79 10R,1%
SB13
NOPOP (Solderbridge)
1
1
2
2
PIN HEADER,2.54mm 1X2P
J9
1
1
2
2
VDD_HV
SB1
NOPOP (Solderbridge)
1
1
2
2
VDD_HVp
VDD_nRFp
SB2
NOPOP (Solderbridge_Open)
1
1
2
2
J7 jumper fitted (Default)
R76 10R,1%
PIN HEADER,2.54mm 1X2P
J7
1
1
2
2
VDD_nRF
J9 jumper fitted (Default)
SB12
NOPOP (Solderbridge_Open)
1
1
2
2