LTE Standard Module Series
EG915U_Series_Hardware_Design 51 / 91
Table 18: Pin Definition of PSM Interface
Pin Name
Pin No.
I/O
Description
Comment
PSM_IND
1
DO
Indicate the module
’s power
saving mode
VRTC power
domain
PSM_EINT
96
DI
External interrupt pin; Wake up
the module from PSM.
VRTC power
domain
A reference circuit is shown in the following figure
.
TVS
TVS
S1
Module
PSM_EXT_INT
VRTC
2. 2K
Close to S1
Figure 25: Reference Circuit of Wake up Module from PSM
4.10. Indication Signal
Table 19: Pin Definition of Indication Signal
Pin Name
Pin No.
I/O
Description
Comment
STATUS
20
DO
Indicate the module's operation
status
1.8 V power domain.
If unused, keep it open.
AP_READY
19
DI
Application processor ready
NET_STATUS
21
DO
Indicate the module's network
activity status
