User Guide
Table Of Contents
- APPLICABILITY TABLE
- Contents
- 1. Introduction
- 2. general Product Description
- 3. Module Connections
- 4. Electrical Specifications
- 5. Hardware Commands
- 6. Power Supply
- 1.
- 7. Antenna(s)
- 8. Hardware Interfaces
- 9. Miscellaneous Functions
- 1.
- 1.
- 1.
- 1.
- 1.
- 10. Mounting the Module on your Board
- 11. Application Guide
- 12. Packing System
- 13. Conformity Assessment Issues
- 1.
- 1.
- 1.
- 14. PRODUCT AND SAFETY INFORMATION
- 15. GLOSSARY
- 16. Document History
LE910Cx HW User Guide
1VV0301298 Rev. 34 Page 43 of 131
Not Subject to NDA
A flow chart showing the AT commands managing procedure is displayed below:
Note
: To check whether the LE910Cx has completely powered on,
monitor the SW_RDY hardware line. When SW_RDY becomes high,
the module is
completely powered on and is ready to accept AT
commands.
Note
: During the SW initialization of the LE910Cx, the SW configures
all pads and interfaces to the desired mode. When PWRMON goes
high, this indicates that the initialization of all I/O pads is completed.
Note
: Do not use any pull-up resistor on the ON_OFF_N line as it is
pulled up internally. Using a pull-up resistor may cause latch-up
problems on the LE910Cx power regulator and improper powering
on/off of the module. The ON_OFF_N line must be connected only in
an open-collector configuration.
Note
: For systems not requiring controlled power ON/OFF,
automatic power on can be supported by shorting the ON_OFF
signal directly to GND
In this case, the module will start power on sequence immediately
after VBATT supply is applied
Note
: Active low signals are labeled with a name that ends with "#" or with
“_N”
Note
: To avoid a back-powering effect, it is recommended to prevent any
HIGH logic level signal from being applied to the module’s digital pins when
it is powered OFF or during an ON/OFF transition.