Regarding PSoC4 and PSoC4S time from POR to execute reset vector’s code.

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YuMa_1534086
Level 7
Level 7
Distributor - Macnica (Japan)
500 replies posted 250 sign-ins 10 likes received

Hello.

Could you please let us know PSoC4 and PSoC4S time from POR to execute reset vector’s code?

Best Regards.

Yutaka Matsubara

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1 Solution

Dear Matsubara-san,

Based on CY8C4xxx, CYBLxxxx Programming Specifications (Document Number: 002-22325 Rev. *E)

http://www.cypress.com/file/409516/download

From external reset released to beginning of "boot code" is <1ms.

PC (program counter in ARM core) would be be "reset" address in vector table during core reset.

pastedImage_0.png

And this would be same between PSoC4 and PSoC4S.

is this time what you would like to know?

Thank you.

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4 Replies
Takashi_M
Moderator
Moderator
Moderator
1000 replies posted 500 solutions authored 750 replies posted

Dear Matsubara-san,

could you please let us know the reason why you would like to know the time from POR to execute reset vector’s code?

And could you please elaborate what "execute reset vector's code" means?

thank you.

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YuMa_1534086
Level 7
Level 7
Distributor - Macnica (Japan)
500 replies posted 250 sign-ins 10 likes received

Hello.

DS describes about POR trip voltage, but not about POR’s time.

So customer would like to know the time it takes for POR to start and complete.

They think that reset vector table’s address is read after POR is completed.

So they would like to know PSoC4 and PSoC4S time from POR starts to until it.

Best Regards.

Yutaka Matsubara

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Dear Matsubara-san,

Based on CY8C4xxx, CYBLxxxx Programming Specifications (Document Number: 002-22325 Rev. *E)

http://www.cypress.com/file/409516/download

From external reset released to beginning of "boot code" is <1ms.

PC (program counter in ARM core) would be be "reset" address in vector table during core reset.

pastedImage_0.png

And this would be same between PSoC4 and PSoC4S.

is this time what you would like to know?

Thank you.

0 Likes
YuMa_1534086
Level 7
Level 7
Distributor - Macnica (Japan)
500 replies posted 250 sign-ins 10 likes received

Hello.

Thank you for your response.

I understand that the time to complete POR is less than 1ms.

Best Regards.

Yutaka Matsubara

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