Regarding to the TraveoII Work falsh

[JackHsu_1153471]

Hi ,

Good day.

I have a questions about read blank work flash through SWD.

I found there is different behavior while CYT2B7xx/CYT4BBxx series read blank work flash.

For CYT4BB/BL series : it is able to read out the random (spurious) data from work flash.

For CYT2B7/BL series : it is unable to read out the random data, and it always shows ACK fault of SWD.

I want to know it is possible to set up CYT2B7's register to make the behavior is same as CY4BB series?

in other words, I hope CYT2B7/BL is able to be read random data if work flash is blank.

Thank you.

Jack

[Ashish]

Hi Jack,

It's not recommended to read blank region in WorkFlash- it may read spurious data and could lead to ECC fault. If you want to check if a region is blank or not, kindly perform a blank check using the BlankCheck api.

Regards,

Ashish

[JackHsu_1153471]

Hi Ashish,

Thanks for your reply.

I know this information as you mention.

Because i face different behaviors on CYT2Bxx series and CYT4Bxxx series, so i'm asking whether a way makes the same behavior. If no, i just ignore it.

Thank you.

Jack

[Ashish · Accepted solution]

Hi Jack,

All devices will behave in similar manner. You can check if FLASHC.WORK_ECC_EN is set or not. Note that as said earlier, reading blank WorkFlash region will lead to ECC fault- so if the ECC check is disabled then fault is not generated- and this results in spurious data being read.  

Thanks,

Ashish

[JackHsu_1153471]

Hi Ashish,

Thanks for your great support.

I will try to test it because I expect the behavior is same in TraveoII series.

Thank you.

[JackHsu_1153471]

Hi Ashish,

Update the status.

I read the register of FLASHC_FLASH_CTL, and the both series is different.

CYT2B7/2BL=> 0x00110000

CYT4BB/4BF => 0x01010000

This is why the behavior is different. 

Then, i have set the value  0x01010000 to CTY2Bxxx series to make the behavior is same as CYT4Bxxx series.

Thanks for your great support.

Jack