Waveshare L76X GPS HAT User Manual page 5

L76X GPS HAT User Manual
Backup mode: FORCE ON button is used to exit Backup mode. Relate to Standby mode, the
consumption of Backup mode is lower. In this mode, module stop searching satellite. UART1 is
inaccessible, only the backup memory (GPS messages and several user variables used for quick start)
in RTC area works. The working current of Backup mode is about 7uA. The only way to wakeup from
Backup mode is pull high of FORCE_ON pin.
CAT24C32: This chip is used to provide ID EEPROM for Raspberry Pi (Include supplier information,
GPIO mapping and device tree information). This chip is added for better compatibility with other
Raspberry Pi HATs according to the micro-HAT(uHAT) standard (https://github.com/raspberrypi/hats )
of Raspberry Pi.
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