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AN3165 Datasheet(PDF) 12 Page - STMicroelectronics

Part # AN3165
Description  Digital PFC and dual FOC MC integration
PDF  31 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3165 Datasheet(HTML) 12 Page - STMicroelectronics

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STM32 digital PFC
AN3165
12/31
Doc ID 17180 Rev 1
Figure 4.
Digital PFC timing
2.6
CPU load and memory size
Through experimental measurements, the CPU (operating at 72 MHz) takes 4.27 µs to
execute the code of the "PFC Routine". By referring this time to a PFC control loop time of
25 µs (40 kHz), the CPU load can be computed as:
Equation 1
Table 2 reports the size of the PFC.o object module in terms of Flash and RAM memory
sizes.
Table 2.
STM32 digital PFC module summary
Read-only code (Flash)
Read-only data (Flash)
Read/write data (RAM)
2088
214
100
CPU load=
%
17
μs
25
μs
27
.
4
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