Texas Instruments MSP430FR6047, User Manual, Page: 10 / 19

increase in this parameter to enable more closely spaced transducers. For transducers spaced 25 µs apart,
increase this count to 15000 ns.
The "Turn on ADC Count" determines when the ADC is turned on. The relevant timing diagrams for the
operation of the ULP bias circuit can be found in the
MSP430FR58xx, MSP430FR59xx, and MSP430FR6xx
Family User's Guide . Do not modify this parameter.
The "Start PGA and IN Bias Count" determines when the PGA and in Bias Circuit is turned on. The relevant
timing diagrams for the operation of the ULP bias circuit can be found in the
MSP430FR58xx, MSP430FR59xx,
and MSP430FR6xx Family User's Guide . Do not modify this parameter.
The “USS XTAL Settling Count” determines how much time is allowed for crystal or resonator settling. Based on
internal experiments, 120 µs is suggested for resonators, and 5000 µs is suggested for crystals.
The "Search Range" parameter is specific to gas algorithms and is not currently used by the "Lobe" algorithm.
4.2.4 Configuration Tuning
After a working configuration has been set, you can experiment with changes to that working set to tune the
system for optimum performance and power.
Table 4-1 indicates how changes in specific configuration
parameters change system performance.
Table 4-1. Configuration Tuning
Parameter
Change to Parameter Affects...
Power
Consumption
Flow
Performance
Standard
Deviation
Zero Flow Drift
Number of Pulses
✔ ✔ ✔ ✔
UPS0 to UPS1 Gap
✔
GUI Based Gain Control
✔ ✔
Transmit Frequency
✔ ✔ ✔
Envelope Crossing Threshold
✔
Capture Duration
✔ ✔ ✔
USS GUI www.ti.com
10 Water Flow Meter SLAU810B – SEPTEMBER 2019 – REVISED SEPTEMBER 2020
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