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AN4253 Datasheet(PDF) 11 Page - STMicroelectronics

Part # AN4253
Description  SPC564Lx device startup flow
PDF  44 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4253 Datasheet(HTML) 11 Page - STMicroelectronics

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DocID024255 Rev 2
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AN4253
FCCU block
4
FCCU block
Figure 5. Flow of the "FCCU check block" phase
FCCU blocks monitors various fault signals coming from different parts of the SPC564Lx
microcontroller during runtime. FCCU module works in parallel to RGM module. It provides
safety measures to signal the fault when reset module fails. Details of FCCU module can be
found in AN3235 (see B.1: Reference documents).
Figure 6. FCCU block diagram
After the reset FCCU module can be in two states depending on the reset type:
•
Destructive/external
resets
FCCU initialized completely, all faults cleared by HW
•
Functional resets
FCCU untouched, status registers contain captured faults



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