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SARA-R4 series - System integration manual
UBX-16029218 - R20
System description
Page 11 of 128
C1-Public
summarizes the internal architecture of SARA-R422 and SARA-R422S modules.
Memory
V_INT
ANT
VCC (Supply)
USB
DDC (I2C)
SIM card detection
SIM
UARTs
Power-control
GPIOs
Antenna detection
Switch
PAs
RF
transceiver
19.2 MHz
Cellular
BaseBand
Processor
Power
Management
Digital audio
Filters
Filters
Figure 2: SARA-R422 and SARA-R422S modules simplified block diagram
summarizes the internal architecture of SARA-R422M8S modules.
Memory
V_INT
ANT
VCC (Supply)
USB
DDC (I2C)
SIM card detection
SIM
UARTs
Power-control
GPIOs
Antenna detection
Switch
PAs
RF
transceiver
19.2 MHz
Cellular
BaseBand
Processor
Power
Management
Digital audio
ANT_GNSS
SAW
LNA
UBX-M8
GNSS chipset
TIMEPULSE
EXTINT
ANT_ON
Filters
Filters
TCXO
26 MHz
TXD_GNSS
Figure 3: SARA-R422M8S modules simplified block diagram
☞
SARA-R422-00B, SARA-R422S-00B and SARA-R422M8S-
00B modules, i.e. the “00
B
” product
versions of SARA-R422, SARA-R422S and SARA-R422M8S modules, do not support the following
interfaces, which should be left unconnected and should not be driven by external devices:
o
Digital audio interface