Flash write speed
Posted: Mon Apr 09, 2018 7:46 pm
Hello,
We recently switched the SPI flash chip on our product. We went from Winbond (W25Q32JV) to Macronix (MX25R3235F). For some reason flash write speeds decreased by a factor of 3. This includes both flashing and formatting SPIFFS speeds. With winbond we were able to flash fw or format spiffs in roughly 8 seconds each. After moving to Macronix, flashing and formatting takes roughly 25 seconds each.
No paramers or fw has changed. I see these timing differences when simply swapping the two versions of our device and programming using the same command. Command from programming and specs for both flash chips are below:
Winbond: http://www.winbond.com/resource-files/w ... 112017.pdf
Macronix: http://www.macronix.com/Lists/Datasheet ... 20v1.5.pdf
Aside from baud rate, flash freq, and dio/qio setting (which are identical in both cases), what else could effect the write speed of flash?
Thanks,
Konstantin
We recently switched the SPI flash chip on our product. We went from Winbond (W25Q32JV) to Macronix (MX25R3235F). For some reason flash write speeds decreased by a factor of 3. This includes both flashing and formatting SPIFFS speeds. With winbond we were able to flash fw or format spiffs in roughly 8 seconds each. After moving to Macronix, flashing and formatting takes roughly 25 seconds each.
No paramers or fw has changed. I see these timing differences when simply swapping the two versions of our device and programming using the same command. Command from programming and specs for both flash chips are below:
Code: Select all
python2 esptool.py --chip esp32 --port /dev/tty.usbserial-DN02PNCC --baud 1500000 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 40m --flash_size detect 0x1000 bootloader.bin 0x10000 firmware.bin 0x8000 partitions.binMacronix: http://www.macronix.com/Lists/Datasheet ... 20v1.5.pdf
Aside from baud rate, flash freq, and dio/qio setting (which are identical in both cases), what else could effect the write speed of flash?
Thanks,
Konstantin