# Can qspi controller on HiFive Unleashed FU540 run in DTR mode?

**URL:** <https://forums.sifive.com/t/can-qspi-controller-on-hifive-unleashed-fu540-run-in-dtr-mode/3502>\
**Category:** HiFive Unleashed\
**Created:** [March 27, 2020, 6:54am UTC](https://forums.sifive.com/t/can-qspi-controller-on-hifive-unleashed-fu540-run-in-dtr-mode/3502 "2020-03-27T06:54:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![HSong](https://avatars.discourse-cdn.com/v4/letter/h/ed655f/32.png) [@HSong](https://forums.sifive.com/u/HSong)\
**Post date:** [March 27, 2020, 6:54am UTC](https://forums.sifive.com/t/can-qspi-controller-on-hifive-unleashed-fu540-run-in-dtr-mode/3502/1 "2020-03-27T06:54:07Z")

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Hello, all

Can the QSPI controller and QSPI flash on HiFive Unleashed FU540 board work in DTR mode?  
That is to use 0Dh, BDH and EDH commands to operate flash.

Looking forward to a reply.

Thanks,  
Hsong

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**Author:** ![Bhushand](https://avatars.discourse-cdn.com/v4/letter/b/c4cdca/32.png) [@Bhushand](https://forums.sifive.com/u/Bhushand)\
**Post date:** [February 12, 2021, 5:10am UTC](https://forums.sifive.com/t/can-qspi-controller-on-hifive-unleashed-fu540-run-in-dtr-mode/3502/2 "2021-02-12T05:10:19Z")

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Hi HSong

As we understand from SiFive, there is no DTR Support from the QSPI controller on the FU540 board,  
the QSPI flash is supporting the DTR mode but you can’t test it.

Thanks  
Bhushan D.