C030-R412M - User Guide
UBX-19010121 - R01
Hardware description
Page 15 of 27
Name Function
Variant
2
R412M
Description
R63
IC19 BQ27441 BIN pull up link to BQVDD
Provisional
R68
HostMCU BOOT0 pull down
HostMCU BOOT0 10 k
Ω
pull down to ground for input setting to
‘0’
R73
GNSS module backup supply by-pass
ZOE-M8B V_BCKP by-pass
R77
Cellular module voltage translator
supply
Voltage translator supply level for the cellular module side for the
HostMCU USART1 communication. Link the translator supply
input to cellular module’s V_INT internal supply output
R78
Cellular module voltage translator
supply
Voltage translator supply level for the cellular module side for the
HostMCU USART1 communication. Link the translator supply
input to the application section supply rail VSYS
R79
LiPo battery charging link
Battery charging and management circuitry link to LiPo battery
for charging
R86
Icellular signal pull down
Provisional
R95
Cellular module UB_M_PWRON to
M_VBCKUP link
100 k
Ω
connection between M_VBCKUP and UB_M_PWRON nets
R96
Cellular module V_BCKP link
Link to M_VBCKUP net
R97
Cellular module PWR_ON link
The HostMCU PD_2 port UB_M_PWRON signal to cellular module
PWR_ON pin
R99
The HostMCU PC_11port to cellular
module GPIO1 link
Not functional
R100 Serial USB sniffer to cellular module
GPIO1 link
Not functional
R101 Cellular module USB VBUS link
Cellular module VUSB_DET
R102 Cellular module GPIO2 link
Link to the HostMCU PD_1 port
R103 Cellular module GPIO4 link
Not functional
R104 Cellular module USB Data_N signal link
Cellular module USB signal to J7 cellular module USB connector
R105 HostMCU USART1 Tx link
When removed isolates HostMCU USART1 Tx pin PA_9 from the
cellular module. Could be used in a configuration to drive the
cellular module from the serial USB sniffer directly.
R107 Cellular module USB Data_P signal link
Cellular module USB signal to J7 cellular module USB connector
R108 InterfaceMCU PSU EN reference
PSU EN voltage threshold voltage divider resistor
R111
HostMCU USART1 Rx link
When removed isolates HostMCU USART1 Rx pin PA_10 from the
cellular module
Could be used in a configuration to drive the cellular module from
the serial USB sniffer directly
R112 IC19 BQ27441 BIN link to LiPo battery
Provisional
R113 Cellular module I2C SCL link
Not functional
R114 Cellular module I2C SDA link
Not functional
R115 Cellular Module GPIO2 option
Cellular module GPIO2 to ground
R116 Cellular Module Pin 21 option
Cellular module Pin 21 to ground
R117 Cellular Module RSVD pin option
Cellular module RSVD pin to ground
R119 Arduino™ Uno R3 interface A5 pin I2C
provision
Link to Arduino™ Uno R3 interface SCL pin
R120 Arduino™ Uno R3 interface A4 pin I2C
provision
Link to Arduino™ Uno R3 interface SDA pin
R121 GNSS PPS LED G3 disable option
Link to LED
R123 GPS_RST net link
Provisional
R124 HostMCU 1.8V Backup Battery link
Links the 1.8V battery backed supply rail to the HostMCU 4 kB of
battery backed SRAM
R131 IC20 BQ24295 QON Pull down
Provisional
