Quectel Wireless Solutions Company Limited 201404UC15M User Manual
UMTS/HSDPA Module Series
UC15 Mini PCIe Hardware Design
UC15_Mini_PCIe_Hardware_Design Confidential / Released 20 / 40
Figure 5: RS232 Level Match Circuit
1. The hardware flow control is disabled by default. AT command AT+IFC=2,2 is used to enable the
hardware flow control. AT command AT+IFC=0,0 is used to disable the hardware flow control. For
more details, please refer to document [2].
2. AT command AT+IPR is used to set the baud rate of the UART. Please refer to document [2] for
details.
3. UART_DTR supports sleep control function. Driving it to low level will wake up the module, and it can
be disabled by command AT+QCFG="pwrsavedtr",0. Meanwhile, the rising edge on UART_DTR
will let the module exit from data mode. Refer to document [2] of command AT&D for details.
4. UART_DCD is used as data transferring indication. You can refer to document [2] for details of
AT&C command. This pin can also be used as AP_READY function, which can detect the host sleep
state to avoid the URC loss during the time when the host is waking up from the sleep state. For
details about AP_READY, please contact Quectel technical support.
3.5. USIM Card Interface
The following table shows the pin definition of the USIM card interface.
Table 7: Pin Definition of the USIM Card Interface
Pin No.
Pin Name
I/O
Description
Power Domain
8
USIM_VDD
PO
Power for the USIM/SIM card.
1.8V/3.0V
NOTES