Quectel EG915U-EU - Page 24

LTE Standard Module Series
EG915U-EU_Hardware_Design 23 / 81
PCM_DIN
6
DI
PCM data input
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
PCM_DOUT
7
DO
PCM data output
V
OL
max = 0.45 V
V
OH
min = 1.35 V
RF Antenna Interface
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
ANT_MAIN
60
AIO
Main antenna interface
50 Ω impedance
ANT_BT/WIFI_
SCAN
56
AIO
Wi-Fi/Bluetooth antenna
interface
50 Ω impedance.
If unused, keep it
open
GRFC Antenna Tuner Control Interface*
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
GRFC1
76
DO
Generic RF Controller
. If unused, keep
this pin open.
GRFC2
77
DO
SPI Interface
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
SPI_CLK
26
DO
SPI clock
V
OL
max = 0.45 V
V
OH
min = 1.35 V
Just master
mode only.
SPI_CS
25
DO
SPI chip select
V
OL
max = 0.45 V
V
OH
min = 1.35 V
SPI_DIN
88
DI
SPI master mode input
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
SPI_DOUT
64
DO
SPI master mode output
V
OL
max = 0.45V
V
OH
min = 1.35V
ADC Interface
Pin Name
Pin No.
I/O
Description
DC
Characteristics
Comment
ADC0
24
AI
General-purpose ADC
interface
Voltage range:
0 V to VBAT
If unused,
keep it open.
ADC1
2
AI
Other Interfaces