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
26
L710
CODEC
PCM _IN
PCM _SYNC
PCM _OUT
PCM _CL K
GND
GND
PCM _DIN
PCM _DOUT
PCM _SYNC
PCM _CL K
0R
0R
0R
0R
Figure 3-19 PCM application circuit（L710HG only support in host mode）
Note:1. L710HG PCM port DC character is base on 1.8 voltage, please pay attention the voltage
matching.
2. If your design need this function, you should connect the PCM_MACLK as the codec chip
clock or add the crystal for PCM clock. About the crystal type please contact our market.
3. L710HG default design base on NAU8814 as the codec chip, the detail design please refer to
《
L710HG reference design
》
.
3.7 USB2.0 interface
3.7.1 USB interface pin definition
L710HG module include a high-speed USB 2.0 compliant interface with maximum 480 Mb/s data rate
according to USB 2.0 specification, representing the main interface for transferring high speed data
with a host application processor. The module itself acts as a USB device and can be connected to any
USB host equipped with compatible drivers.
The USB is the most suitable interface for transferring full speed data between module and a host
processor, available for AT commands, data communication, FW upgrade, Below table is the module
USB pin definition:
Table 3-11 USB interface pin definition
Pin No.
Signal name
I/O
type
DC characteristic（V）
Min. Typ. Max.
6 USB_DM USB2.0 date D-
- - -
7 USB_DP USB2.0 data D+
- - -
3.7.2 USB Interface application
USB bus is mainly used for data transmission, software upgrading, module testing. Work in the
full-speed mode of the USB line, if you need ESD design, ESD protection device must meet the
junction capacitance value <5pf, otherwise the larger junction capacitance will cause waveform