User's Manual

LTE Module
EC20 Hardware Design
EC20_Hardware_Design Confidential / Released 13 / 83
1.
1)
Audio (PCM) function is only supported on Telematics version.
2.
2)
This function is under development.
3.
3)
When the module works within this restricted temperature range, RF performance might degrade.
For example, the frequency error or the phase error would increase.
2.4. Functional Diagram
The following figure shows a block diagram of EC20 and illustrates the major functional parts.
 Power management
 Baseband
 DDR+NAND flash
 Radio frequency
 Peripheral interface
Baseband
PMIC
Transceiver
2G NAND
1G SDRAM
PA
Switch
LNA
Switch
ANT_MAIN ANT_DIVANT_GNSS
VBAT_BB
VBAT_RF
APT
PWRKEY
ADCs
VDD_EXT USB USIM PCM
UARTI2C
RESET_N
19.2M
XO
STATUS
GPIOs
SAW
SAW
Control
IQ Control
Duplex
SAW
Tx
PRx DRx
NOTES