The fastest speed of SPIS

RE: The fastest speed of SPIS

Håkon Alseth — Mon, 10 May 2021 09:41:32 GMT

Hi,

The description on how to update the pointers is described in the SPIS chapter that I previously posted.

The 300 ns number defined here is the minimal CSN inactive time between two transfers for the SPIS peripheral to successfully detect it properly.

Yes, I agree that if you should handle the event, and update the pointer registers; 300 ns is very tight timing. In most cases, you would most likely need a bit more time, depending on how your firmware is setup.

Kind regards,

Håkon

RE: The fastest speed of SPIS

helen — Fri, 07 May 2021 12:28:46 GMT

Excuse me, Where is the pointer update mechanism in the PS,I don't know if the pointer can be updated in 300 nanoseconds in the PS.

RE: The fastest speed of SPIS

Håkon Alseth — Thu, 06 May 2021 10:48:17 GMT

Hi,

Theoretically, yes, but you have to ensure that you are able to update the pointers, as described in the PS:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/spis.html?cp=4_2_0_31_2#concept_abk_lbf_wr

Kind regards,

Håkon

RE: The fastest speed of SPIS

helen — Thu, 06 May 2021 09:28:44 GMT

Excuse me，If the spi master sent the first 255-byte packet to SPIS ，then the spi master send the second 255-byte packet to SPIS at 300 nanoseconds .Can SPIS receive the second 255-byte packet ?

RE: The fastest speed of SPIS

Håkon Alseth — Mon, 03 May 2021 06:55:02 GMT

Hi,

[quote user=""]Excuse me，If the spi master sent a 255-byte packet to SPIS every 300 nanoseconds continuously,Can SPIS receive the data in its entirety?[/quote]

300 ns is the minimum idle time between each transaction, regardless of size of that transaction.

Kind regards,

Håkon