The Problem of TJA1021

[zjgchenzhen]

I use the S32k144 chip and LIN transceiver TJA1021. When I set the SLP_N PIN to LOW, then the TJA1021 go to the sleep mode, and the INH change from High to floating. I want to know whether the MCU is powe off now (sleep mode & INH is floating)?

Note: Hardware circuit is as folloing.

[TomasVaverka]

Hi Chen,

Yes, when the SLP_N is low, the TJA1021 is put into low power (sleep) mode and the INH pin becomes floating which typically disables the voltage regulator and powers off the MCU.

Best regards,

Tomas

[zjgchenzhen]

Thank you for your strong help. The problem is solved.