Product Info

LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design
3-26
/ 105
SD_INS_
DET
23
DI
SD card insertion
detect
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
1.8V power domain.
If unused, keep it
open.
VDD_SDIO
34
PO
SD card SDIO bus
pull-up power
I
O
max=50mA
1.8V/2.85V
configurable. Cannot
be used for SD card
power.
If unused, keep it
open.
SGMII Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
EPHY_RST_N
119
DO
Ethernet PHY reset
For 1.8V:
V
OL
max=0.45V
V
OH
min=1.4V
For 2.85V:
V
OL
max=0.35V
V
OH
min=2.14V
1.8V/2.85V power
domain.
If unused, keep it
open.
EPHY_INT_N
120
DI
Ethernet PHY
interrupt
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
1.8V power domain.
If unused, keep it
open.
SGMII_
MDATA
121
IO
SGMII MDIO
(Management Data
Input/Output) data
For 1.8V:
V
OL
max=0.45V
V
OH
min=1.4V
V
IL
max=0.58V
V
IH
min=1.27V
For 2.85V:
V
OL
max=0.35V
V
OH
min=2.14V
V
IL
max=0.71V
V
IH
min=1.78V
1.8V/2.85V power
domain.
If unused, keep it
open.
SGMII_
MCLK
122
DO
SGMII MDIO
(Management Data
Input/Output) clock
For 1.8V:
V
OL
max=0.45V
V
OH
min=1.4V
For 2.85V:
V
OL
max=0.35V
V
OH
min=2.14V
1.8V/2.85V power
domain.
If unused, keep it
open.