UMTS/HSPA Module Series
UG96 Hardware Design
UG96_Hardware_Design 24 / 76
RXD
TXD
RI
DTR
AP_READY
TXD
RXD
EINT
GPIO
GPIO
Module
GND
GND
Host
Figure 3: Sleep Mode Application via UART
The RI of module is used to wake up the host and AP_READY* will detect the sleep state of host (can be
configured to high level or low level detection). Customers should pay attention to the level match shown
in dotted line between module and host. Drive DTR pin to low level to wake up the module.
In sleep mode for UART application, the UART port is not accessible.
“*” means under development.
3.5.1.2. USB Application with Suspend Function
If the host communicates with module via USB interface and supports USB suspend function, the
following preconditions must be met to let the module enter into sleep mode.
⚫
Execute
AT+QCFG="uart/power",0,0
to set UART into auto on/off mode.
⚫
Execute
AT+QSCLK=1
to enable the sleep mode.
⚫
The host
’s USB bus, which is connected with the module’s USB interface, enters into suspended
state.
The following figure shows the connection between the module and host.
NOTE