SIGMATEK CCP 621, Manual

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CCP 621 C-DIAS PROSESSOR MODULE
Page 36 27.03.2020
16 Application Exceptions
16.1 SRAM and IRQ routines
Writing remnant data during interrupt routines is not allowed and leads to a system crash.
16.2 SRAM and Consistency of Changed Data
If more than 32 different sectors are changed (512 bytes each) shortly before shutting down
the voltage supply while the user program is writing to the microSD card, this can some-
times lead to partial loss of remnant data.
16.3 The File System Does Not Support Safe Writing via SRAM
If files are stored, modified or written on the microSD card from the user program, these
files must always be stored with a fixed maximum size. Since changes in size and the sim-
ultaneous shutdown of the voltage supply can corrupt the file system, a later change in the
file size is not allowed.
16.4 Data Breakpoint
This CPU does not support the data breakpoint feature.