Use Instructions
Table Of Contents
- 1 About this document
- 2 Product Overview
- 3 Interface Description
- 3.1 PIN Definition
- 3.2 Operating condition
- 3.3 Digital I/O characteristics
- 3.4 Power Interface
- 3.5 UIM interface
- 3.6 PCM interface(TBD)
- 3.7 USB2.0 interface
- 3.8 UART Interface
- 3.9 Power on/off and reset interface
- 3.10 Interactive interface
- 3.11 Net Light interface
- 3.12 System boot configuration and download
- 3.13 Analog and Digital conversion (ADC) interface
- 3.14 I2C interface
- 3.15 SPI interface
- 3.16 Antenna interface
- 4 Product characteristics
- 5 Design guideline
- 6 Manufacturers
- 7 Package Storage information
- 8 Safety Information
L710HG Hardware Design
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3.9.4 Force PSM mode Out
When the L710HG in PSM (Power saving mode) you can force the module to exit PSM mode by
pulling down the PWRKEY pin. About how to enter the PSM please refer the L710HG AT command
user manual.
3.9.5 Reset sequence
L710HG do not have special RESET pin to reset module. PWRKEY is used for reset pin. This
function is used as an emergency reset only when AT command “AT+CPOF” and the PWRKEY pin
has no effect. User can pull PWRKEY pin to ground 12s, the module will reset.
Note: it is recommended that only in an emergency, such as module without response, use the
RESET function.
3.9.6 Power on/off and reset interface application
R10
R11
Pulse
MODULE
PWRKEY
4.7K
4.7K
1S
Figure 3-17: Reference power on/off reset circuit
Another way to control the PWRKEY pin is directly using a push button switch. Need to set a button
near the TVS to ESD protection. The image below for reference circuit: