Table of Contents
Advertisement
level. In this mode, the module can still receive paging message, SMS, voice call and
TCP/UDP data from the network normally.
In this mode, the power management unit (PMU) shuts down the power supply,
Power Down
software goes inactive and the serial interfaces are not accessible. However, the
Mode
VBAT pins are still powered.
3.5. Power Supply
3.5.1. Power Supply Pins
UG89 provides two VBAT pins for connection with the external power supply.
The following table shows the details of power supply and GND pins.
Table 7: VBAT and GND Pins
Pin Name
Pin No.
VBAT
4, 57
3, 5, 8,37,
39, 41, 52,
58~62, 64~67,
GND
73,
82~84,
89~97, 106
110~120
3.5.2. Decrease Voltage Drop
The power supply range of the module is 3.3V~4.5V. Please make sure that the input voltage will never
drop below 3.3V. If the voltage drops to below 3.3V, the module will be turned off automatically. The
following figure shows the voltage drop during burst transmission in 2G network. The voltage drop will be
less in 3G networks.
UG89_Hardware_Design
Description
Power supply for module
Ground
UMTS/HSPA+ Module Series
UG89 Hardware Design
Min.
Typ.
Max.
3.3
3.8
4.5
-
-
-
Unit
V
-
23 / 73
Advertisement
Table of Contents
