UMTS/HSPA Module Series
UC20 EVB User Guide
UC20_EVB_User_Guide Confidential / Released 27 / 30
Table 13: Indication of D101
4.2. Power Off UC20-TE-A and UC20 Mini PCIe
There are several ways to power off UC20-TE-A module and UC20 Mini PCIe module.
One way is to execute AT command AT+QPOWD (refer to
document [2]
). It is the best and safest
approach. It logs off the network and saves data before it is shut down. This way suits for UC20-TE-A
module and UC20 Mini PCIe module, but UC20 Mini PCIe module will be powered on again after
shut-down.
The other way is to press S202 (PWRKEY) at least 0.6 second and then release, the module will be shut
down. This way is only used for UC20-TE-A module.
4.3. Reset UC20-TE-A and UC20 Mini PCIe
The emergency restart option is only used in the case of emergency. For example, the software does not
respond for more than 5 seconds due to some serious problems.
Pull down the UMTS
module’s reset pin by pressing the key S203 (more than 150ms) to release a reset
and then reset UMTS module. This may cause the loss of information stored in the memory since the
reset is initialized.
4.4. Communication via USB or UART Interface
4.4.1. Communication via USB Interface
1. Power on the UMTS module.
2. Connect EVB and PC with USB cable through USB interface, refer to
document [1]
to install USB
driver from the Driver Disk, select communication port number as below:
.
3. Configure AT Command Window, correct port and operate the UMTS module via AT commands.
Reference
State
Description
D101
STATUS
Always ON
Registered to network.
Always OFF
Others.
Quectel
Condidential
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