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Original question:

RTOS/CC3200: Flash write issue , If we power off the device while writing to flash.

CC3200: Flash fault while Power quality is poor

Cary Wang
Intellectual 580 points
Part Number: CC3200


Dears:

We use CC3200 to design wifi module with external Flash(GD25Q80CEIGR).

But meet the problem: Flash fault while Power quality is poor. (Power off while booting or Voltage drop while running) 

        For there are many types of end-users, Customers' power supply stability is not guaranteed。

        Is there any solutions to solve the problem?

Many thanks!

  • 0
    Guru 80275 points
    Hi,

    Your flash memory from Gigadevice (GD25Q80CEIGR) is not listed at list of recommended/tested flesh memories for CC3200 devices ( processors.wiki.ti.com/.../CC3100_&_CC3200_Serial_Flash_Guide ). Your memory is operating in voltage range 2.7 to 3.6V. In comparison with MX25V8006E (memory from list above) which works in voltage range 2.35 to 3.6V. It should be expected, that such type of flash is more affected by voltage drops which may happens.

    Such kind of issue with voltage drops can be solved by:
    - by selecting flash memory with wider operating voltage range
    - with proper PCB design and using sufficient size of decoupling capacitors for flash memory

    Also you should follow instructions stated here:
    processors.wiki.ti.com/.../CC3100_&_CC3200_Serial_Flash_Guide and chapters below.

    Jan