Reset for SRAM and OTP programming via USART

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rofe
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Reset for SRAM and OTP programming via USART

Is reset needed during SRAM and OTP programming using UARTinterface and SmartSnippets tool?

BB_Dialog
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Hi rofe,

Hi rofe,

yes, preferably the Reset is needed.

Else, a Power Cycle will put the device in Boot Sequence mode too.
But take care no bouncing takes place, if so it won't work.

B.R., Dialog Support

rofe
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I don't have access for reset

I don't have access for reset pin in our application.

I tried power cycle on evaluation board by selecting VCC_3V in J13 and supply battery holder with clean power source that can be
switch on and off without bouncing effect. However, this didn't work.

Do you have some idea how to try power cycle on the evaluation board?

WT_Dialog (not verified)
Hi rofe,

Hi rofe,

Normally a FTDI cable delivers 2V to 3V voltage on Rx and Tx line. Before you power cycle DA14580, please make sure the high voltage is not applied on DA14580. Such a voltage can prevent the chip from booting sequence since power reset signal cannot be properly generated.

You would need a buffer or an interface board to enable UART communication just after VBAT is being supplied. If you could give me your email address, I can share the schematics and layout of the board with you.

rofe
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Hi,

Hi,

Yes, that schematics nad layout will be useful. Please send it torofe@wsi.nu

Regards,
rofe

Rayson
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Hi WT_Dialog,

Hi WT_Dialog,

I needs the schematics also, please send with below emailxirong.lan@rayson.com

Thanks.

MT_dialog
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Hi Rayson,

Hi Rayson,

You can find the interface board schematics in the document AN-B-020 End produt testing and programming guidelines p.23.

Thanks MT_dialog