41113915
Rev 0.3
June 17, 2020
6
2. Power
2.1.
Power Supply
The host provides power to the EM9190 through multiple power and ground pins as summarized in
The host must provide safe and continuous power (via battery or a regulated power supply) at all
times; the module does not have an independent power supply, or protection circuits to guard against
electrical issues.
Table 2-1
Power and Ground Specifications
Name
Pins
Specification
Min
Typ
Max
Units
VCC
(3.3V)
2, 4, 24, 38, 68, 70, 72, 74
Voltage range
3.135
3.3
4.4
V
Ripple voltage
-
-
100
mV
pp
Peak Current
-
-
4000
mA
Continuous
Current
-
TBD
-
mA
GND
3, 5, 11, 27, 33, 39, 45, 51, 57, 71, 73
-
0
-
V
2.2.
Module Power States
The module has five power states, as described in
Table 2-2 Module Power States
State
Details
H
o
s
t
Is
P
o
w
e
re
d
H
o
s
t
In
te
rf
a
c
e
A
c
ti
v
e
R
F
E
n
a
b
le
d
Normal (Default
State)
Module is active
Default state. Occurs when VCC is first applied,
Full_Card_Power_Off# is deasserted (pulled high), and
W_DISABLE# is deasserted
Module is capable of placing/receiving calls, or establishing data
connections on the wireless network
Current consumption is affected by several factors, including:
Radio band being used
Transmit power
Receive gain settings
Data rate
✓
✓
✓
2
