RoyalTek REB-1315LP - Manual (Page 17)

RoyalTek Confidential 17
REB-1315LP Operational Manual
V_RTC_3V3 (Backup battery )
This is the battery backup input that powers the SRAM and RTC (Real Time Clock) when
main power is removed. Typical current draw is 10uA.
The supply voltage should be between 2.5V and 3.6V.
ON_OFF (GPS Sleep Mode)
This pin is triggered soft on/off request. Please shall only used to wake up chip. Control for
hibernate. Please let it N.C.
GPIO Functions
Several I/Os are connected to the digital interface connector for custom applications.