nrf_drv_qspi_write taking around 500 micro sec ( long time to write ) . Why it could be problem ?

[ARPITHA CHANDRASHEKAR]

nrf_drv_qspi_write taking around 500 micro sec ( long time to write ) . How to optimize nrf_drv_qspi_write time.?

[Amanda Hsieh]

Hi, 

How much data are you writing in nrf_drv_qspi_write()? When you called nrf_drv_qspi_init(&config, ...), what was the parameter for config.phy_if.sck_freq?

-Amanda H.

[ARPITHA CHANDRASHEKAR]

Currently set to 32 MHz QSPI.

32 * 4 ( 4 lines transfer )=128 bits / sec = 128 killo bits per 1 milli sec = 32 killo bytes per 1 milli sec ;

So, for 512 bytes of transfer it should take = 512* 1 milli/32killo = 16 micro sec ideally it should take , its taking 666 micro sec. which is huge