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
35
Pin No.
Net name
I/O
type description
39 NETLIGHT DO Module net state identify control LED port
3.11.2 Net light application
The L710HG module has 1 pins for controlling the LED display, which can be used as an indicator of
network connection status. Different network states are represented by the mode of the flashing light.
This pin is an GPIO，with An external NPN Transistor，External connect VBAT can directly drive
LED. Drive current capacity varies according to external NPN model ， recommend use
DTC143ZEBTL，Drive current biggest can reach 100 mA, below is the reference circuit.
Table 3-18 LED pin signal working status
Network modulation state Module working condition
Normally on Looking for the net, or on the line
200ms on / 200ms off Data connection established
800ms on / 800ms off Network registered
Long off Shutdown, or sleep mode
L710
LED
VLED
NETLIGHT
R1
R2
Figure 3-20 Status indicator reference circuit
Note: R1, R2 value according to the voltage VLED and LED working current.
Table 3-18 NETLIGHT status
Net Status
Module working status
Always on
Searching Network/Call Connect
200ms ON, 200ms OFF
Data Transmit
800ms ON, 800ms OFF
Registered network