ST67W611M1 Datasheet: Pin values?

[Lars Beiderbecke]

When looking at the datasheet for the ST67W611M1, it seems that pins CHIP_EN, SPI_CS, and SPI_RDY are all High active.  Is this really correct, or are some signals simply missing the bar on top?

Also, the description for pin BOOT doesn't indicate which value is for SPI and which one is for UART.  Could you please clarify?

Finally, are RESERVED pins simply NC, or should I do something else with them?

(The forum labels apparently haven't been updated yet to include "Wifi".)

Thanks,
Lars

[Andrew Neil]

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@Lars Beiderbecke wrote:

When looking at the datasheet for the ST67W611M1

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This: https://www.st.com/resource/en/datasheet/st67w611m1.pdf ?

That is, indeed, very light on details.

Normally, we would expect there to be a Reference Manual (RM) giving operational details - but no sign of that on the Product Page

https://www.st.com/en/wireless-connectivity/st67w611m1.html#documentation

I guess they're just expecting that people will use the X-CUBE-ST67W61 software pack - not try to write software from scratch?

@TarikAb 

[TarikAb · Accepted solution]

Hi Lars,

CHIP_EN, SPI_CS and SPI_RDY are indeed all active high. More can be found here. 

You can also find more details regarding the BOOT signal and options on this page.

Please do let us know if some items are still unclear.
.

[Andrew Neil]

An active-high SPI chip select??!

Surely, CS is active-low by definition^* in SPI ?

via: https://en.wikipedia.org/wiki/Serial_Peripheral_Interface#Operation

That must be incompatible with just about every other SPI definition in the world ?!

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* Insofar as "SPI" has any formal definition.