TCAN1145-Q1: can not be waked up when power it on in first time

Hi Gary,

I don't quite understand the question, TCAN1145-Q1 doesn't have an internal LDO for 3.3V/5V output, which output / pin are your referring to?

Regards,

Sean

Hi Sean,

TCAN1145 is connected with DSP. DSP will get the instruction by CAN interface and then control another power part to output 3.3V and 5V.

The question is that TCAN1145 can no be waked up so there are no output of 3.3V and 5V.

Hi Gary,

Can they read the interrupt registers when this unresponsive wakeup issue happened? Can they also read the MODE_CNTRL register to confirm the selective wakeup is enabled?

I would also recommend they clear all the interrupts before entering sleep mode, enable the selective wakeup should be in the same SPI command to change into sleep mode.

Regards,

Sean

Hi Sean,

As you can see, issue machine under the sleep mode has different reg value when compared with normal machine after sleep command.

We are considering if the reason is that F28034 didn't successfully initialize TCAN1145 or there is a power drop on Vsup.

Hi Gary,

On the non-wake up transceiver, 0x32 and 0x33 registers are configured differently than the normal transceiver, so the WUF will not be able to match what it configured. 

Can they check if their MCU configured those registers correctly?

Regards,

Sean

Hi Sean,

Customer has already configured the ID register but it lost. Are there some reasons can cause ID register missing?

I add the normal resgister value after normal POR without configured by DSP in fifth column. As you can compare it with issue register value and see, There are some differences in yellow, which means customer successfully configured the issue register but ID value lost. What is the potential reason?

Hi Gary,

Please let the customer to answer those questions I asked on webex.

Regards,

Sean