Does S32K3XX's FCCU compatible to FS4500's FCCU ?

[snaku_lee]

Hi,

I have a question about the FCCU,

I know the recommend SBC for S32K3XX is FS26, but if I use FS45 as the PMIC to S32K, does their FCCU function are compatible?

Regards,

Snaku

[Dflo]

Hi Tomas,

I am using S32k311 and S32DS 3.5, can you tell me, if I want to use FCCU, which MCAL driver should I use?

[TomasVaverka · Accepted solution]

Hi Snaku,

The FCCU monitoring feature on FS26xyD devices is more complex.

For instance, it supports 8 different error protocols:

• No monitoring
• FCCU1 AND FCCU2 inputs monitoring activated by pair (Bi-stable protocol)
• FCCU1 or FCCU2 single input level monitoring activated
• FCCU1 input level monitoring only. FCCU2 input not used
• FCCU2 input level monitoring only. FCCU1 input not used
• FCCU1 or FCCU2 single input PWM monitoring activated
• FCCU1 input PWM monitoring only, FCCU1 input level monitoring            
• FCCU2 input PWM monitoring only, FCCU2 input level monitoring

Also various settings such as filtering time, error impact on Reset and Safety output is configurable by SPI.

For a detailed description, please take a closer look at chapter FCCU monitoring in the FS26 datasheet.

Please note that the FS26 is not a replacement of FS45/65, both devices are being sold and supported in parallel. They have different market targets and product position.

Best regards,

Tomas

[snaku_lee]

Hi Tomas,

If our ECU safety requirement is ASIL-B, is there any concern for S32K324 + FS4500 ?

Regards,

Snaku

[TomasVaverka]

Hi Snaku,

The FCCU function is not a must for ASIL B system. So the FS45 ASIL B version does not support FCCU monitoring, ASIL D version of course yes. It can work together with the S32K324 MCU.

Best regards,

Tomas