Wwan_Led; Wowwan - Quectel EM05-G Hardware Design

4.4.3. WWAN_LED#

WWAN_LED# is used to indicate the RF status of the module, and its sink current is up to 9 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.
The following table shows the RF status indicated by WWAN_LED#.
Table 16: RF Status Indications of WWAN_LED#
WWAN_LED# Logic Level
Low Level (LED ON)
High Level (LED OFF)

4.4.4. WOWWAN#

The WOWWAN# is an open drain pin, which requires a pull-up resistor on the host. When a URC returns,
a 1s low level pulse will be outputted to wake up the host.
EM05-G_Hardware_Design
VCC(Typ. 3.3 V)
R1
330 Ω
LED1
WWAN_LED#
Figure 22: 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 voltage level (airplane mode enabled).
⚫ AT+CFUN=4 (RF function disabled).
Module
2, 4
VCC
70,72,74
10
LTE Standard Module Series
EM05-G Hardware Design
PMIC
45 / 69