5G Module Series
RM505Q-AE Hardware Design
RM505Q-AE_Hardware_Design 43 / 79
Host
Module
W_DISABLE2#
W_DISABLE1#
BB
GPIO
GPIO
26
8
VDD 1.8 V
Note:
The voltage level of VCC_IO_HOST could be 1.8 V or 3.3 V typically.
R3
100k
R2
100k
R5
10k
VCC_IO_HOST
R6
10k
Figure 23: W_DISABLE1# and W_DISABLE2# Reference Circuit
3.11.3. WWAN_LED#*
The WWAN_LED# signal is used to indicate the 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 in the figure below. The LED is ON when the WWAN_LED# signal is at low voltage
level.
Host
Module
WWAN_LED#
PMU
GPIO
10
VCC
Note:
This VCC could be the power supply of the module.
LED
R1
330
Ω
Figure 24: WWAN_LED# Reference Circuit
The following table shows the RF status indicated by WWAN_LED# signal.