4.5.3. WWAN_LED#
The WWAN_LED# signal is used to indicate RF status of the module, and its sink current is up to 10 mA.
To reduce current consumption of the LED, a current-limited resistor must be placed in series with the
LED, as illustrated by the figure below. The LED is ON when the WWAN_LED# signal is at low level.
VCC(Typ. 3.7V)
R1
330 Ω
LED1
The following table shows the RF status indicated by WWAN_LED#.
Table 23: Network Status Indications of WWAN_LED#
WWAN_LED# Level
Low Level (LED on)
High Level (LED off)
4.5.4. 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.
RM510Q-GL_Hardware_Design
VCC
WWAN_LED#
Figure 25: WWAN_LED# Reference Circuit
Description
RF function is turned on
RF function is turned off if any of the following occurs:
⚫
The (U)SIM card is not powered.
⚫
W_DISABLE1# is at low level (airplane mode enabled).
⚫
AT+CFUN=4 (RF function disabled).
RM510Q-GL Hardware Design
Module
2, 4
70,72,74
10
PMIC
5G Module Series
50 / 87