Product Info

LTE Standard Module Series
EC25 Series Hardware Design
EC25_Series_Hardware_Design 35 / 126
1.
1)
PCM interface pins are used for audio design on EC25 series module and BT function on FC20
module.
2. BT function is under development.
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
WAKEUP_IN
1
DI
Sleep mode control
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
Cannot be pulled up
before startup.
Low level wakes up
the module.
If unused, keep it
open.
W_DISABLE#
4
DI
Airplane mode
control
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
Pull-up by default.
At low voltage level,
module can enter
airplane mode.
If unused, keep it
open.
AP_READY
2
DI
Application
processor sleep
state detection
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
If unused, keep it
open.
USB_BOOT Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
USB_BOOT
115
DI
Force the module to
enter emergency
download mode
V
IL
min = -0.3 V
V
IL
max = 0.6 V
V
IH
min = 1.2 V
V
IH
max = 2.0 V
1.8 V power domain.
Cannot be pulled up
before startup.
It is recommended to
reserve test point.
RESERVED Pins
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
RESERVED
3, 18, 43,
55, 7384,
113, 114,
116, 117,
140-144.
Reserved
Keep these pins
unconnected.
NOTES