LTE Module Series
EC21 Hardware Design
EC21_Hardware_Design Confidential / Released 25 / 94
V
IL
min=-0.3V
V
IL
max=0.6V
V
IH
min=1.2V
V
IH
max=2.0V
open.
SDC1_
DATA2
130
IO
SDIO data bus D2
V
OL
max=0.45V
V
OH
min=1.35V
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.
SDC1_
DATA1
131
IO
SDIO data bus D1
V
OL
max=0.45V
V
OH
min=1.35V
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.
SDC1_
DATA0
132
IO
SDIO data bus D1
V
OL
max=0.45V
V
OH
min=1.35V
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.
SDC1_CLK
133
DO SDIO clock
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
If unused, keep it
open.
SDC1_CMD
134
DO SDIO command
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
If unused, keep it
open.
PM_ENABLE
127
DO
External power
control
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
If unused, keep it
open.
WAKE_ON_
WIRELESS
135
DI
Wake up the host
(EC21 module) by
FC20 module.
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
1.8V power domain.
Active low.
If unused, keep it
open.
WLAN_EN
136
DO
WLAN function
control via FC20
module
V
OL
max=0.45V
V
OH
min=1.35V
1.8V power domain.
Active high.
If unused, keep it
open.
COEX_UART_
RX
137
DI
LTE/WLAN
coexistence signal
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.
Quectel
Confidential
