External flash memory

PeWosT
Posts: 10
Joined: Wed Feb 01, 2017 3:59 pm

External flash memory

Postby PeWosT » Thu Feb 02, 2017 8:04 am

Hi, I have some nor flash memory like micron M25P80-VMW6TG, how can I connect them to my esp32?

ESP_puff
Posts: 13
Joined: Tue Jan 10, 2017 8:34 am

Re: External flash memory

Postby ESP_puff » Thu Feb 09, 2017 11:39 am

Hi PeWosT,
You can look up the ESP32 datasheet. We use HSPI to connect external flash. You need to follow the protocol of HSPI.

Thanks

FCT_IOT
Posts: 36
Joined: Fri Jan 26, 2018 11:15 am

Re: External flash memory

Postby FCT_IOT » Fri Jan 26, 2018 11:33 am

Dear Sir,

I am interested in using ESP-WROOM-32D. I would like to connect an external SPI Flash.

I have made some research on various forums related to above mentioned topic. I have learnt the following alternatives:

1. Connecting to HSPI interface (as mentioned in this post)

2. Connecting to the same SPI Lines as the internal flash, but using a different gpio as a chip select line and using efuse.

I would like to know if there is any configuration steps required to connect external HSPI Flash, do we need to use efuse.

It would be helpful if espressif can release a step by step guide related to interfacing external flash.

Does Espressif provide higher capacity flash in ESP-WROOM -32D modules

Thanks in advance

FCT_IOT
Posts: 36
Joined: Fri Jan 26, 2018 11:15 am

Re: External flash memory

Postby FCT_IOT » Thu Feb 01, 2018 12:07 pm

Ping

WiFive
Posts: 1911
Joined: Tue Dec 01, 2015 7:35 am

Re: External flash memory

Postby WiFive » Thu Feb 01, 2018 2:12 pm

#2 is if you want to replace internal flash and boot from external flash. #1 is if you want to keep internal flash and add external flash for data. No efuse settings required for using hspi.

FCT_IOT
Posts: 36
Joined: Fri Jan 26, 2018 11:15 am

Re: External flash memory

Postby FCT_IOT » Thu Feb 01, 2018 2:17 pm

WiFive wrote:#2 is if you want to replace internal flash and boot from external flash. #1 is if you want to keep internal flash and add external flash for data. No efuse settings required for using hspi.


Thank you for the reply.

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