CC2340R5: SPI : CS and CLK latency

haithem chamkhi

Part Number: CC2340R5
Other Parts Discussed in Thread: SYSCONFIG

Hi,
I'm using the CC2340 as a controller and i want to know if we can add a delay between when the CS go low and the CLK starts ?

Is the C2340 hardware is capable of doing that ?

This is how the actual SPI signal look like in the CC2340. As you can see there is no delay between CS and the clk.

thanks,

over 1 year ago

+1 Clément over 1 year ago

TI__Guru** 101450 points

Hi,

Thank you for reaching out.

In order to control the delay between the CS and the CLK signals, I would recommend to configure the SPI driver for Three PIN operations (should be done in SysConfig). The CS line can then be controlled "manually" (i.e. through the GPIO driver).

This approach is implemented in the NVS driver for external flash (see <SDK>\source\ti\drivers\nvs\NVSSPI25X.c).

I hope this will help,

Best regards,

0 haithem chamkhi over 1 year ago in reply to Clément

Prodigy 60 points

Thanks,

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CC2340R5: SPI : CS and CLK latency