TC35680FSG datasheet(32/91 Pages) TOSHIBA

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TC35680FSG-002/TC35681FSG-002

2019-04-04

Condition on Return from Low Power Mode

The low power mode of TC35680/TC35681 can be enabled to switch to the Active mode by the following condition.



One of the triggers in Table 3-4 occurs in the corresponding low power mode.

Even if TC35680/TC35681 is in the Low power mode, they temporarily return to the Active mode at the timing of the Bluetooth®

connection or the timing of Advertising or Scanning without the wake-up notification to the host CPU and user application. After

executing the communicating, they enter the Low power mode again.

Table 3-4 Wake-up and boot factors

Note 1: When the Auto-Advertising function is set before the transition to the Backup mode, TC35680/TC35681 wake up themselves

after a set number of the Advertising packets are transmitted.

Note 2: If there is counter which can count more than one hour using the 1-second timer, TC35680/TC35681 wake up themselves

temporarily every hour in the Sleep mode. This wake-up notification isn’t sent to the user application. The time interval cannot

be changed.

Note 3: In the case that the Auto-Advertising function is used. For the details, refer to Section 4.3.

Acquisition of Wake-up Factor and Return from Low Power Mode

The user application can acquire a wake-up factor by using the API “SYS_API_GetWakeUpCauseValue()”. After the acquisition of

the wake-up factor, a proper procedure in the user software program should be done. For details of the wake-up factors and the API,

refer to the “Programming Guide”.

The procedure for wake-up in the Deep Sleep mode is the same as that of the cold boot. It can be recognized that the wake-up is

done at the Deep Sleep mode.

If the retention of the RAM data is not set before Sleeping, the data is lost at the wake-up in a low power mode.

Sleep mode

Backup mode

Deep Sleep mode

Reset mode

 GPIO0 interrupt or GPIO15 interrupt

 ANYKEY wake-up interrupt

 RTC alarm

 Expiration of the counter of the

1-second timer or the 1-ms timer.

 Reception of a packet from a remote

device.

 Hardware reset deassertion.

 One hour elapses after the transition

to the Sleep mode. (Note 2)

 GPIO0 interrupt or GPIO15 interrupt

 ANYKEY wake-up interrupt

 RTC alarm

 Connection request from a remote

device (Note 3)

 The number of the auto-advertising

becomes a set value. (Note 1)

 Hardware reset deassertion

 GPIO0 interrupt or GPIO15 interrupt

 Hardware reset deassertion

 Hardware reset

deassertion

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