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Hi, we are using CYW20706+Wiced6.4 for an important project, after days of pressure test, we found a tricky problem:
In a fast booting senario (power on/off hundreds times ), part of SS section (2~3KBytes from address 0x0000) might be written to 0 , so the chip will boot to HCI mode as it think the SPI flash is invalid, although the application area (start from 0x4000) is still there.
This is a huge risk for us as when SS corrupted , the chip can not work at all !
Can anyone help me ?
HELP!
THANKS!
Solved! Go to Solution.
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For the abnomal chip, i notice that it boot to HCI mode (send hci reset command 01 03 0C 00 to chip , chip response 04 0e 01 03 0c 00 ), so i remove the SPI flash and attach to an exteral MCU (i.e. STM32F4) for content reading, and it turn out that the SS flash area corrupted.