Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- Introduction
- Product Concept
- Application Interfaces
- GNSS Receiver
- Antenna Interfaces
- Electrical, Reliability and RadioCharacteristics
- Mechanical Dimensions
- Storage, Manufacturing and Packaging
- Appendix A References
LTE Module Series
EG61-NA Hardware Design
EG61-NA_Hardware_Design 34 / 77
Table 7: Pin Definition of PWRKEY
Pin Name Pin No. Description DC Characteristics Comment
PWRKEY 15 Turn on/off the module
V
IH
max=2.1V
V
IH
min=1.3V
V
IL
max=0.5V
The output voltage is 0.8V
because of the diode drop in
the Qualcomm chipset.
When EG61-NA is in powerdownmode, it can be turned on to normal mode by driving the PWRKEY pin to
a low level for at least 500ms. It is recommended to use an open drain/collector driver to control the
PWRKEY.After STATUS pin outputting a high level, PWRKEY pin can be released. A simple reference
circuit is illustrated in the following figure.
Turn on pulse
PWRKEY
4.7K
47K
≥ 500ms
10nF
Figure 10: Turn on the Module Using Driving Circuit
Another way to control the PWRKEY is using a button directly. When pressing the key, electrostatic strike
may generate from the finger. Therefore, aTVS component is indispensable to be placed nearby the
button for ESD protection. A reference circuit is shownin the following figure.
PWRKEY
S1
Close to S1
TVS
Figure 11: Turn on the Module Using Button
The turn on scenario is illustrated in the following figure.