kw45

TejasN2255 — Wed, 15 Jul 2026 06:15:15 GMT

Hello team,

WE were designing a product using KW45 and we saw it supports LPSPI, but we wanted to interact with the QSPI flash W25Q128JWFIQ TR.

Does it supports?

if it does, what and all possible hardware and software configurations need to be done

Re: kw45

Christine_Li — Thu, 16 Jul 2026 09:27:03 GMT

Hi, @TejasN2255

Thanks for creating case to us.

Yes, it supports.

You can use KW45 to interact with the QSPI flash W25Q128JWFIQ TR.

But because KW45 doesn't have FlexSPI and no execute-in-place (XIP) path, so you could only talk to the W25Q128JWFIQ over its LPSPI peripheral.

To use it, you need to be careful for the Supply voltage. The W25Q128JWFIQ is 1.8 V nominal (1.7–1.95 V). The KW45's I/O rail feeding LPSPI1 (VDD_MEM on the EVK) must be set to 1.8 V; do not tie it to a 3.3 V rail.

You can refer to our KW45B41Z-EVK_SCH schematics page 5, we have a similar connection with AT25XE161D-MAHN-T, but the difference is the Supply voltage.

Best regards,

Christine.

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kw45

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