3 Replies Latest reply on May 18, 2017 11:02 PM by arvindk_86

Deep-Sleep Timers

jon_magnussen_2466981 May 16, 2017 4:08 AM

Can someone describe the timer peripherals that are available to run in Deep-Sleep? How many are there, and how many are consumed by the BLE stack?

1. Re: Deep-Sleep Timers

arvindk_86 May 18, 2017 1:53 AM (in response to jon_magnussen_2466981)

Hi,

A watch dog timer (WDT) and two multi-counter WDTs (MCWDT) are available for timing and interrupt generation in deep sleep mode.
WDT = 16-bit, MCWDT = 3 counters (16-bit, 16-bit, 32-bit : cascadable to 64-bit)

Note that in deep sleep, all high speed clocks are off and Timer peripherals (TCPWM) are not active.
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2. Re: Deep-Sleep Timers

jon_magnussen_2466981 May 18, 2017 5:01 AM (in response to arvindk_86)

I am not familiar with the MCWDT, but I read the brief document about it.

Can the period be adjusted after it's started? This is necessary if the timer is to be used in tickless mode as the RTOS tick source.
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3. Re: Deep-Sleep Timers

arvindk_86 May 18, 2017 11:02 PM (in response to jon_magnussen_2466981)

Yes, the period can be adjusted dynamically. Or locked out to prevent accidental changes.
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