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PSoC™ 5, 3 & 1 Forum Discussions

MaMi_1205306
Level 7
Level 7
500 replies posted 50 solutions authored 25 likes received

Hi,

We have a question about IMO of PSoC5LP.

PSoC5LP Datasheet URL
https://www.cypress.com/file/45926/download

The following specifications are listed on page 112 of the data sheet.

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IMO Startup time: max 13 us

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(1)
Is this 13us time from the start of IMO until it stabilizes?

(2)
Is it necessary to stabilize 13us even when switching from 24MHz (USB mode) to 24MHz (non USB mode)?

In low power consumption mode, USB is not used.
Switching clocks only when USB is required.
Therefore, I would like to confirm this spec.

Regards,

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1 Solution
Ekta
Moderator
Moderator
Moderator
250 solutions authored 100 likes received 250 sign-ins

Hello Masashi-San,

(1) The startup time for IMO is 13us, this means that the IMO requires 13us to stabilize after the device is started.

(2)In case you want to transition from low power mode to Active mode (IMO). The IMO will require stabilization time of 13 us to stabilize, since IMO is not active in low power modes.

When the transition from 24MHz (USB, Active mode) to 24MHz (non USB, active) occurs it would not require a stabilization time of 13us if the clock source remains the same. The transition will be immediate.

Best Regards

Ekta

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Ekta
Moderator
Moderator
Moderator
250 solutions authored 100 likes received 250 sign-ins

Hello Masashi-San,

(1) The startup time for IMO is 13us, this means that the IMO requires 13us to stabilize after the device is started.

(2)In case you want to transition from low power mode to Active mode (IMO). The IMO will require stabilization time of 13 us to stabilize, since IMO is not active in low power modes.

When the transition from 24MHz (USB, Active mode) to 24MHz (non USB, active) occurs it would not require a stabilization time of 13us if the clock source remains the same. The transition will be immediate.

Best Regards

Ekta

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