How to clear SBC FS4500 DIAG_VSUP_VCAN->ILIM_CAN & DIAG_SPI->SPI_REQ?

[juliusjai]

I'm working on DIAG monitor for SBC FS4500 and I have encountered DIAG_VSUP_VCAN->ILIM_CAN and

DIAG_SPI->SPI_REQ are always set. In fact CAN communication is working well and the SBC output power supply is very stable.

Does anybody has idea to avoid this behavior?

Thanks,

Julius

[reyes]

Hi,

ILIM_CAN and SPI_REQ are cleared when reading these bits or with a Power On reset.

Have a great day,
Jose

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[phanendravarma_]

Hello Jose, 

I had similar problem.

I operated chip in Debug mode to analyze spi commands.

But while reading the MODE register it always giving chip is in Normal Mode(instead of INIT mode) . and whenreading HWCONFIG debug bit it's responding with debug mode is not enabled. 

One more observation was SPI_REQ bit in Diag register was always Set never cleared after Read or POR. 

Any inputs from your side were highly appreciated .

Thanks

PVR