Perst# Signal; Led_Wwan# Signal - Quectel EC200T Hardware Design

Software method can be controlled by AT+CFUN, and the details are as follows.
Table 13: Airplane Mode Controlled by Software Method
AT+CFUN=?
0
1
4

3.10.4. PERST# Signal

The PERST# signal can be used to force a hardware reset on the card. The module can be reset by
driving the PERST# signal low for at least 300ms and then releasing it . The PERST# signal is sensitive to
interference. The traces should be as short as possible and be surrounded with ground. The reset
scenario is illustrated in the following figure.
NOTES
S
1. Please ensure that there is no large capacitance with the max value exceeding 10nF on PERST# pin.
2. PEREST# only resets the internal baseband chip of the module and does not reset the power
management chip.

3.10.5. LED_WWAN# Signal

The LED_WWAN# signal of EC200T Mini PCIe is used to indicate the network status of the module, and
can absorb a current up to 40mA. According to the following circuit, in order to reduce the current of the
LED, a resistor must be placed in series with the LED.
The LED is emitting light when the LED_WWAN# output signal is low.
EC200T_Mini_PCIe_Hardware_Design
RF Function Status
RF and (U)SIM disabled
RF enabled
RF disabled
VBAT
≥300ms
PERST#
≤0.5V
V
IL
Module
Running
Baseband resetting
Status
Figure 11: Timing of Resetting Module
LTE Standard Module Series
EC200T Mini PCIe Hardware Design
Module Operation Mode
Minimum functionality mode
Normal mode
Airplane mode
Baseband restart
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