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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3.13 Analog and Digital conversion (ADC) interface
L710HG integrated two analog-to-digital conversion interface, specific parameters are as follows:
Table 3-20 ADC1, ADC2 characters
characters
Min. Typ. Max. Unit
ADC1 accuracy -11 ±6 11 mv
ADC1 Input voltage range 0 1.875 v
ADC1 Input resistance 1 -- -- MΩ
Transfer time -- 514 550 us
Note: The need for special software version to support access to the ADC.
3.14 I2C interface
3.14.1 I2C pin definition
I2C is used to communicate with peripheral equipment and can be operated as either a transmitter or
receiver, depending on the device function. Both SDA and SCL are bidirectional lines connected with
I2C interface. Its operation voltage is 1.8V. High speed mode transmission rate can reach 400 KBPS,
Because L710HG haven’t internal pulled up to the I2C interface, so in your design need pull up.
Below figure is the reference design:
I2C is used as the control interface for communication with perimeters. The operating voltage is 1.8v,
and the transmission rate in high-speed mode can reach 1MHZ. There is a pull-up resistance inside the
L710HG module，We still recommend keeping the NC resistance pull-up Settings externally.
Below figure is the reference design:
DEVICES
SCL
GND
GND
SCL
VDD1V8
SDA
MODULE
SDA
R12 R13
NC
NC
Figure 3-22 I2C reference design