17
edits
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Added possible LD series LDO data sheet
'''NFC/RFID 4k EEPROM'''
*PC13 = RF WIP/Busy(Pin 7)*PB6 = SCL(Pin 6)*PB7 (''needs confirmed, signal routes under STM)'' = SDA(Pin 5)
'''STG719 (DPST) - U2'''
*PC11 = IN(Pin 1)
'''STG719 (DPST) - U3'''
*PD2 = IN(Pin 1)
'''STG719 (DPST) - U4'''
*PB5 = IN(Pin 1)
'''STG719 (DPST) - U5'''
*PB4= IN(Pin 1)
'''DG636 (Dual DPST) - U6'''
*VDD = ENABLE (always HIGH) (Pin 2)*PA10 = A0(Pin 1)*''UnknownPin#1'' (routes under STM) = A1(Pin 14)
'''STG719 (DPST) - U7'''
*''UnknownPin#1'' (routes under STM) = IN(Pin 1)
'''SN74LV4053 (Triple 2Ch Mux/Demux) - U8'''
*PB13 & PB14 = A(Pin 11)**STM pins connected by trace**? ''Why? Read back?''*''UnknownPin#1'' (routes under STM) = B (Pin 10) & C(Pin 9)**IC pins connected by trace '''Analog Inputs to STM2''' *PA0 - Vbatt/Power supply voltage (''needs confirmation)''*PB1 - Vbatt/Power supply current monitor (''needs confirmation)''
<br />
|DFN6
|33R
|[https://www.mouser.com/datasheet/2/389/ld39050-1849494.pdf Possible part from Mouser]|''Needs verification, appears to provide 3.3V for GNSSregulated power''
|-
|U14
