LPS55S69 : SPI3 utilization in ISP mode

EugeneHiihtaja — Thu, 12 Mar 2020 13:05:01 GMT

Hello !

Could you confirm if SPI3 can be utilized by Bootrom for ISP communication in chip revision 1B ?

on EVK board I have set P1 jumper and SPI3 should be routed to PMOD connector and UART to P8.

When I have tried to use SPI3 on 0B EVK - it worked that time.

With with 1B - only HSSPI on P17 connector and UART are respond in ISP mode.

HSSPI is respond to Ping command and UART to blhost get property command as they should.

Could you please and confirm asap ( we need to finalise HW ) that

- SPI3 in 1B silicon revision can be used in ISP mode ( HS SPI works right now only )

- SPI3 interface support ping command 5A A6

- EVK board has right routing and etc. for utilize SPI3 in ISP mode ( via my own FW it work right)

What ever I send to SPI3 it not force bootrom to select this interface and stop polling others.

At any moment I can send property command to UART and get response. And UART is selected as ISP interface.

It means bootrom ignore SPI3 somehow.

What can be wrong with SPI3 or EVK ?

Regards,

Eugene

Re: LPS55S69 : SPI3 utilization in ISP mode

ZhangJennie — Tue, 17 Mar 2020 07:29:46 GMT

Eugene

As we discussed in 00264906, SPI3 is not used for 1B silicon.

We will fix the document issue in next release.

Thanks for bringing the problem to our attention!

Jun Zhang