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Hello Cypress,
Firmware cannot be written to some of our products.
After release from hardware reset, there is no response after HCI_RESET command.
Upon analysis, it was found that strange data was written in the internal flash memory of CYBT-333032.
We try put it in recovery mode by connecting SPI2_MOSI pin and GND, and erased the internal flash memory, there is response after HCI_RESET command, and firmware can be written.
But our products has no circuit to enter recovery mode. Because according to the CYBT-333032 datasheet, SPI2_MOSI pin is no connect pin.
Is the blank state of the built-in flash memory not guaranteed at the time of shipment?
Is a circuit required to enter recovery mode?
Thanks,
Manabu
Solved! Go to Solution.
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Hi MaYa_3009166 San,
Q: Please let me confirm, is the blank state of the built-in flash memory not guaranteed at the time of shipment?
A: No, the module will be programmed with Ez-Serial platform FW . For any other specific requests, you may have to contact our marketing or local FAE team with project and opportunity details.
Regards,
Anjana
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Hello MaYa_3009166 San,
Yes , it is recommended to have Recovery procedure . That is the only way we can ensure that the chip is in download mode.
Please refer to below references :
Programming an EZ-BT WICED Module – KBA223428
WICED Module Programmer User Guide – KBA225060
Regards,
Anjana
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Hello Anjana San,
I think it should be written in the data sheet...
(according to the CYBT-333032 datasheet, SPI2_MOSI pin is NO connect pin)
Since it is controlled from the host microcomputer, we use a MOSFET to connect SPI2_MOSI to GND.
Please let me confirm, is the blank state of the built-in flash memory not guaranteed at the time of shipment?
Thanks,
Manabu
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Hi MaYa_3009166 San,
Q: Please let me confirm, is the blank state of the built-in flash memory not guaranteed at the time of shipment?
A: No, the module will be programmed with Ez-Serial platform FW . For any other specific requests, you may have to contact our marketing or local FAE team with project and opportunity details.
Regards,
Anjana