2
edits
Changes
m
Add note about wire colors when splicing a USB cable
*PA9(TX) = USB D+
*PA10(RX) = USB D-
====Si4063 (SPI_1)====
*PA6 = SDO (Pin 13)
*PA5 = SCLK (Pin 12)
*PD0 = GPIO2 (Pin 19)
*PA4 = GPIO3 (Pin 20)
'''NFC/RFID 4k EEPROM'''
*PA0 - Vbatt/Power supply voltage (''needs confirmation)''
*PB1 - Vbatt/Power supply current monitor (''needs confirmation)''
'''Battery Management IC'''
*
PC0 - Hold high to prevent BMS from removing battery power after boot up
<br />
|U10
|Silicon Labs
|Si4063-C2A
|High Performance, Low Current Transmitter
|QFN20
|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
*VBUS: 5 Volts DC
*D-(typically white): TX*D+(typically green): RX
*GND: GND