ATTINY817-MFR. datasheet(74/492 Pages) MICROCHIP

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X means active. X* indicates that the RUNSTBY bit of the corresponding peripheral must be set to

enter active state.

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PTC is only available in devices with 8KB Flash (ATtiny817).

11.3.2.2 Wake-Up Time

The normal wake-up time for the device is 6 Main Clock cycles (CLK_PER), plus the time it takes to start

up the Main Clock source:

•

In Idle sleep mode the Main Clock source is kept running so it will not be any extra wake-up time.

•

In Standby sleep mode the Main Clock might be running, so it depends on the peripheral

configuration.

•

In Power Down sleep mode only the ULP 32KHz oscillator and RTC clock may be running, if it is

used by the BOD or WDT. All other clock sources will be off.

Table 11-3. Sleep modes and Start-up time

Sleep mode

Start-up time

IDLE

6 CLK

Standby

6 CLK + OSC start-up

Power Down

6 CLK + OSC start-up

The start-up time for the different clock sources is described in the Clock Controller (CLKCTRL) section.

In addition to the normal wake-up time it is possible to make the device wait until the BOD is ready before

executing code. This is done by writing 0x3 to the BOD Operation Mode in Active and Idle bits (ACTIVE)

in the BOD Configuration fuse (FUSE.BODCFG). If the BOD is ready before the normal wake-up time, the

net wake-up time will be the same. If the BOD takes longer than the normal wake-up time, the wake-up

time will be extended until the BOD is ready. This is ensures correct supply voltage whenever code is

executed.

11.3.3

Configuration Change Protection

Not applicable.

ATtiny417/817

Datasheet Complete

DS40001901B-page 74

ATTINY817-MFR. Datasheet(PDF) 74 Page - Microchip Technology