Quectel EG25-GL, Проектирование аппаратного обеспечения

Страница: 27 / 105

LTE Standard Module Series
EG25-GL_Hardware_Design 26 / 96
Require external
pull-up to
SGMII_MDIO_VDD,
and the resistor
should be 1.5
kΩ.
If unused, keep it
open.
SGMII_MDC 122 DO
SGMII management
data clock
SGMII_MDIO_VDD
1.8/2.85 V power
domain.
If unused, keep it
open.
SGMII_TX_M 123 AO SGMII transmit (-)
Connect with a
0.1
μF capacitor,
which is close to the
two pins of the
module.
If unused, keep it
open.
SGMII_TX_P 124 AO SGMII transmit (+)
SGMII_RX_P 125 AI SGMII receive (+)
SGMII_RX_M 126 AI SGMII receive (-)
SGMII_MDIO_
VDD
128 PO
SGMII_MDIO pull up
power supply
I
O
max = 50 mA
Configurable power
source.
1.8/2.85 V power
domain.
If unused, keep it
open.
Antenna Interfaces
Pin Name Pin No. I/O Description DC Characteristics Comment
ANT_DIV 35 AI
Diversity antenna
interface
50
Ω impedance.
If unused, keep it
open.
ANT_MAIN 49 AIO
Main antenna
interface
50
Ω impedance.
ANT_GNSS 47 AI
GNSS antenna
interface
50
Ω impedance.
If unused, keep it
open.
Other Interface Pins
Pin Name Pin No. I/O Description DC Characteristics Comment
WAKEUP_IN 1 DI
External wakeup
signal to the module
VDD_EXT
1.8 V power domain.
Cannot be pulled up
before startup.
The pin can wake up