LTE-A Module Series
EM160R-GL_Hardware_Design 42 / 73
3.8.4. WAKE_ON_WAN#
The WAKE_ON_WAN# is an open drain pin, which requires a pull-up resistor on the host. When a URC
returns, a one-second low level pulse signal will be outputted to wake up the host. The module operation
status indicated by WAKE_ON_WAN# is shown as below.
Table 19: State of the WAKE_ON_WAN#
Host
Module
WAKE_ON_WAN#
BB
GPIO
23
VCC_IO_HOST
NOTE:
The voltage level on VCC_IO_HOST depends on the host side due to open drain in pin 23.
Wake up the host
1 s
H
L
R1
10K
Figure 19: Reference Design of WAKE_ON_WAN#
3.8.5. DPR
EM160R-GL provides a DPR (Dynamic Power Reduction) signal for body SAR (Specific Absorption Rate)
detection. The signal is sent by a host system proximity sensor to the module to provide an input trigger
which will reduce the output power in the radio transmission.
Table 20: Function of the DPR Signal
WAKE_ON_WAN# State
Module Operation Status
Output a one-second pulse signal at low level
SMS
Always at high level
Idle/Sleep
DPR Level
Function
High/Floating
Max. transmitting power will not back off
Low
Max. transmitting power will back off