Texas Instruments LP-MSPM0C1104 User Manual page 6

Hardware
2.4 Measure Current Draw of the MSPM0C1104
To measure the current draw of the MSPM0L1306 MCU using a multimeter, use the 3V3 jumper on the J101
jumper isolation block. The current measured includes the target device, launchpad circuits, and any current
drawn through the BoosterPack plug-in module headers.
To measure ultra-low power, follow these steps:
1. Remove the 3V3 jumper in the J101 isolation block, and attach an ammeter across this jumper.
2. Consider the effect that the backchannel UART and any circuitry attached to the MSPM0C1104 can have
on the current draw. Consider disconnecting these at the isolation jumper block, or at least consider their
current sinking and sourcing capability in the final measurement.
3. Make sure there are no floating inputs/outputs (I/Os) on the MSPM0C1104. This causes unnecessary extra
current draw. Every I/O is either driven or, if the I/O is an input, is pulled or driven to a high or low level.
4. Begin target execution.
5. For the most accurate current measurements, place the device in Free Run mode and disconnect
programming signals between the MSPM0L1306 and the debug portion of the board (header J101).
6. Measure the current. Keep in mind that if the current levels are fluctuating, then getting a stable
measurement can be difficult. Measuring the quiescent states is easier.
2.5 Clocking
The internal SYSOSC is 24 MHz as default at the accuracy of 2.5%. The MCLK is sourced by 32-MHz SYSOSC
at default. CPUCLK is sourced directly from MCLK in RUN mode and disabled in other modes. The low-power
clock (ULPCLK) can be sourced by MCLK and active in RUN and SLEEP mode by configuration. For more
clock tree details see Section 2.3 Clock Module (CKM) of the MSPM0 C-Series Microcontrollers Technical
Reference Manual.
2.6 BoosterPack Plug-in Module Pinout
The LaunchPad development kit adheres to the 20-pin LaunchPad development kit pinout standard, where
pins are available. A standard was created to aid compatibility between LaunchPad development kits and
BoosterPack plug-in modules across the TI ecosystem.
While most BoosterPack plug-in modules are compliant with the standard, some are not. If the reseller or owner
of the BoosterPack plug-in module does not explicitly indicate compatibility with the MSPM0C1104 LaunchPad
development kit,then compare the schematic of the candidate BoosterPack plug-in module with the LaunchPad
development kit to verify compatibility. Conflicts can be resolved by changing the MSPM0C1104 device pin
function configuration in software.
6 LP-MSPM0C1104 Evaluation Module
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SLAU908 – OCTOBER 2023
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