IWR1443: 1.8V SPI Falsh

Zhaohong Zhang1

Part Number: IWR1443

Hi, there.

We need to use 1.8V I/O in our application with IWR1443. Would you please recommend a 1.8V SPI flash to replace MX25V1635F used on IWR1443BOOST? Are there any other careabouts for using 1.8V I/O? Another question is if it is possible to modify IWR1443BOOST to verify 1.8V I/O operation?

Thanks,

Zhaohong

over 6 years ago

0 CHETHAN KUMAR Y.B. over 6 years ago

TI__Mastermind 25835 points

Zhaohong,

Please refer to below supported flashes app-note. Which has wide voltage part which should support both 3.3V and 1.8V standards.

http://www.ti.com/lit/an/sprach9a/sprach9a.pdf

For the 1.8V I/O operation you need to feed 1.8V on the VIO_IN supply. Also you need to ensure all the pull ups are tied to 1.8V supply.

And all the external peripherals (such as SPI, UART, I2C, GPIOs etc) also need to be 1.8V I/O operation.

IWR1443BOOST EVM is not designed to support 1.8V operation.

Thanks and regards,

CHETHAN KUMAR Y.B.

0 aozer over 6 years ago

TI__Mastermind 30715 points

Hello Zhaohong,

The below flash devices support 1.8V and can be used:

MX25R1635FZNIH0

MX25U1633FZNQ

In general, you can use the below document to determine if a flash will work. As long as it meets the requirements listed in this document it should work regardless of whether it is 1.8V or 3.3.V.

http://www.ti.com/lit/an/sprach9a/sprach9a.pdf

Regards,

Adrian

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IWR1443: 1.8V SPI Falsh