Fibocom L850-GL Series User Manual

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FIBOCOM L850-GL Series Hardware Guide Page 14 of 59
2.5 Hardware Block Diagram
The hardware block diagram in Figure 2-2 shows the main hardware functions of L850 module, including
baseband and RF functions.
Baseband contains the followings:
 UMTS/LTE TDD/LTE FDD controller
 PMU
 NAND/internal LPDDR2 RAM
 Application interface
RF contains the followings:
 RF Transceiver
 RF Power/PA
 RF Front end
 RF Filter
 Antenna Connector
+3.3V
FULL_CARD_POWER_OFF#
RESET#
PCIe
USB2.0
USB 3.0
USIM
EINT
WOWWAN#
LED
I2S
I2C
CLOCK
Tunable ANT
Baseband
(UMTS/LTE TDD/LTE FDD controller)
PMU
TX
LPDDR2
RAM
NAND
Div
MB FEM
Main LB
FEMiD
PA DCDC
PA
Main RX
Div RX
RF Part
M.2 Key-B 75pin interface
Div ANT
Main ANT
GNSS/
Beidou
RF
Transceiver 1st
TCXO
RF
Transceiver 2nd
Div
LB FEM
Diplexer Diplexer
Main MB
FEMiD
TX
Main RX
Div RX
Duplexer
SAW
SAW
Figure 2-2 Hardware block diagram

Fibocom L850-GL Series Specifications

General

Category	GSM/GPRS Modules
Model	L850-GL
Form Factor	M.2
Operating Temperature	-10°C to +55°C
Storage Temperature	-40°C to +85°C
GSM Bands	850/900/1800/1900MHz
GNSS	GPS, GLONASS, BeiDou, Galileo
Interface	USB 2.0, UART, PCM, I2C, GPIO
Operating Voltage	3.135V to 4.4V
LTE FDD	B1, B2, B3, B4, B5, B7, B8, B12, B13, B17, B18, B19, B20, B25, B26, B28, B29, B30, B66
LTE TDD	B38/B39/B40/B41
WCDMA	B1, B2, B4, B5, B8
AT Command Set	3GPP TS 27.007
Certifications	CE, FCC, GCF, PTCRB