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add link to errata

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This commit is contained in:
Joey Castillo 2021-08-08 15:14:36 -04:00
parent ac7807d9f5
commit ca96db1ef5
1 changed files with 7 additions and 6 deletions
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13
watch-library/watch/watch.h
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@ -428,12 +428,13 @@ uint32_t watch_get_backup_data(uint8_t reg);
* Waking from backup is effectively like waking from reset, except that your @ref
* app_wake_from_deep_sleep function will be called.
* @warning In initial testing, it seems like the ALARM_BTN pin (PA02 RTC/IN2) cannot wake the device
from deep sleep mode. There is an errata note (Reference: 15010, linked) that says that
due to a silicon bug, PB01 cannot be used as RTC/IN2. It seems though that this bug may
also affect PA02. As a result — and I'm very bummed about this — you cannot use deep sleep
mode unless you set up an external wake interrupt using a device on the nine-pin connector
(i.e. an accelerometer with an interrupt pin). Otherwise your only option for waking will
be to unscrew the watch case and press the reset button on the back of the board.
* from deep sleep mode. There is an errata note (Reference: 15010, linked) that says that
* due to a silicon bug, PB01 cannot be used as RTC/IN2. It seems though that this bug may
* also affect PA02. As a result — and I'm very bummed about this — you cannot use deep sleep
* mode unless you set up an external wake interrupt using a device on the nine-pin connector
* (i.e. an accelerometer with an interrupt pin). Otherwise your only option for waking will
* be to unscrew the watch case and press the reset button on the back of the board.
* http://ww1.microchip.com/downloads/en/DeviceDoc/SAM_L22_Family_Errata_DS80000782B.pdf
*/
void watch_enter_deep_sleep();
/// @}