5G Module Series
RM505Q-AE Hardware Design
RM505Q-AE_Hardware_Design 44 / 79
Table 16: Network Status Indications of WWAN_LED# Signal
3.11.4. 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 17: State of the WAKE_ON_WAN# Signal
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 the open drain in pin 23.
Wake up the host
1s
H
L
R1
10k
Figure 25: WAKE_ON_WAN# Signal Reference Circuit
WWAN_LED# Logic Level
Description
Low (LED on)
RF function is turned on
High (LED off)
RF function is turned off if any of the following occurs:
⚫
The (U)SIM card is not powered.
⚫
W_DISABLE1# is at low voltage level (airplane mode enabled).
⚫
AT+CFUN=4
(RF function disabled).
WAKE_ON_WAN# State
Module Operation Status
Output a one-second pulse signal at low
voltage level
Call/SMS/Data is incoming (to wake up the host)
Always at high voltage level
Idle/Sleep