UMTS/HSPA(+) Module Series
UC200T-EM Hardware Design
UC200T-EM_Hardware_Design 23 / 68
“*” means under development.
3.5.
Power Supply
3.5.1.
Power Supply Pins
UC200T-EM provides four VBAT pins dedicated to connecting with the external power supply. There are
two separate voltage domains for VBAT.
⚫
Two VBAT_RF pins for module RF part
⚫
Two VBAT_BB pins for module baseband part
The following table shows the details of VBAT pins and ground pins.
Table 6: VBAT and GND Pins
Talk/Data
Network connection is ongoing.
In this mode, the power consumption is
decided by network setting and data transfer rate.
Minimum
Functionality
Mode
AT+CFUN=0
command can set the module to a minimum functionality mode without
removing the power supply. In this case, both RF function and USIM card will be
invalid.
Airplane Mode
AT+CFUN=4
command can set the module to airplane mode. In this case, RF
function will be invalid.
Sleep Mode*
In this mode, the current consumption of the module will be reduced to the minimal
level. During this mode, the module can still receive paging message, SMS, voice
call and TCP/UDP data from the network normally.
Power Down
Mode
In this mode, the power management unit shuts down the power supply. Software is
not active. The serial interface is not accessible. Operating voltage (connected to
VBAT_RF and VBAT_BB) remains applied.
Pin Name
Pin No.
Description
Min.
Typ.
Max.
Unit
VBAT_RF
57, 58
Power supply for module RF
part
3.4
3.8
4.3
V
VBAT_BB
59, 60
Power supply for module
baseband part
3.4
3.8
4.3
V
GND
8, 9, 19, 22, 36,
46, 48, 50~54,
Ground
0
V
NOTE