Texas Instruments TPL5010, User Manual, Page: 11 / 22

\
nA
DMM
S_ON_OFF
I_SEL
J1
J2
R_SEL
IO
CR2032
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Operation
3 Operation
Once the EVM is powered ON, the TPL5010 starts working. Refer to the TPL5010 datasheet ( SNAS651 )
for further details on the timing:
• Configure the trimmer equal to 5 k
Ω
to set a time interval of 1 s.
• When an RSTn pulse is generated by the TPL5010, the red LED (D2) is turned on. The green LED
(D1) is turned on when a WAKE signal is generated by the TPL5010.
• If the DONE switch (S2) is pushed, a DONE pulse is sent to the TPL5010. If the DONE pulse is sent
within the programmed time interval, at the next cycle the green LED (D1) is turned ON.
• When the M_RST switch (S1) is pushed, a manual reset pulse is sent to the TPL5010. For both DONE
and M_RST pulses, the width of the pulse is proportional to the pressure time. While the M_RST
switch is pressed the red LED turns ON.
3.1 Supply Current Measurement
3.1.1 Supply Current Measurement of the TPL5010 Only
First, turn off the EVM (ON/OFF switch to OFF position), then disconnect the EVM from the LaunchPad or
microcontroller, in order to not load the digital output pins of the DUT.
• Leave the I_SEL jumper open.
• Do not leave digital input pins floating ; Short the DONE pin (second pin of IO header) to GND (first
pin of IO header), turn OFF the Q1 and Q2 MOSFET (as explained in Table 3 ).
• Connect a digital multimeter, configured as the current meter (able to measure nA), between
AUX_VDD and pin 1 of I_SEL.
• Turn on the EVM (ON/OFF switch to ON position).
• Read the current consumption on the DMM.
Figure 10. Current Measurement Setup – TPL5010 Only
11 SNAU173 – January 2015 TPL5010 Evaluation Module
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