Cinterion
®
ELS31-VA/ELS51-VA Hardware Interface Description
1.3 Circuit Concept
13
ELS31-VA_ELS51-VA_HID_v01.000
2017-01-04
Confidential / Preliminary
Page 13 of 106
1.3
Circuit Concept
The following figure shows block diagram of the ELS31-VA/ELS51-VA module and illustrate
the major functional components (see
):
Baseband block:
•
baseband processor and power management
•
serial NOR flash and LPDDR RAM memory
•
Application interface (SMT with connecting pads)
LTE RF section:
•
RF transceiver
•
RF power amplifier/front-end module and duplexers
•
Receive SAW filters
Figure 2:
ELS31-VA/ELS51-VA baseband block diagram
SPDT
RF Switch
B13 Duplexer
B4 Duplexer
SPDT
RF Switch
PA DC/DC
PMIC
B13 SAW
B4 SAW
SQN3241
B13 PA
B4 PA
Primary
Antenna
Diversity
Antenna
TCXO
Control
RXIF1
RXIF2
TXIF
CLKREF
512Mbit LPDDR
SPI Flash
ELS31-V 256Mbit
ELS51-V 512Mbit
SIM
Level
Shifter
32.768kHz
Xtal
SQN3223
GPIO
SPI
UARTS
USB
HSIC
SDIO
SIM