Service Guide
Table Of Contents
- Safety Information
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Overview
- 3 Operating Characteristics
- 4 Application Interfaces
- 5 Antenna Interfaces
- 6 Electrical Characteristics and Reliability
- 7 Mechanical Information and Packaging
LTE-A Module Series
EM060K-GL&EM120K-GL_Hardware_Design 44 / 78
H ost M odule
W _DISABLE2#
W _DISABLE1#
BB
G P IO
G P IO
26
8
VDD
1
.
8
V
R 5
10
K
R 6
10K
N O TE
: The voltage level of VC C
_IO _H O S T could be 1.8 V o r 3.3 V ty p ic a lly .
VCC_IO _HO ST
R 2
100K
R 3
100K
Figure 21: W_DISABLE1# and W_DISABLE2# Reference Circuit
4.4.3. WWAN_LED#
The WWAN_LED# signal is used to indicate RF status of the module, and its sink current is up to 10 mA.
To reduce power consumption of the LED, a current-limited resistor must be placed in series with the LED,
as illustrated in the figure below. The LED is ON when the WWAN_LED# signal is at low level.
Module
WWAN_LED#
PMU
10
VCC (Typ. 3.7 V)
R1
330 Ω
LED1
2, 4
70, 72, 74
VCC
Figure 22: WWAN_LED# Reference Circuit
The following table shows the RF status indicated by WWAN_LED#.
Table 19: Network Status Indications of WWAN_LED#
WWAN_LED# Level Description
Low Level (LED On) RF function is turned on