Installation Instructions
Table Of Contents
- Contents
- List of Table
- List of Figures
- 1 About this document
- 2 Product Overview
- 3 Mechanical Dimensions
- 4 Interface description
- 4.1 Pin Definition
- 4.2 Operating conditions
- 4.3 Digital logic characteristics
- 4.4 Power interface
- 4.5 USIM card interface
- 4.6 PCM interface
- 4.7 USB2.0 interface
- 4.8 UART interface
- 4.9 SPI interface
- 4.10 I2C interface
- 4.11 Network light
- 4.12 System Status Indication
- 4.13 Flight Mode
- 4.14 Forced USB download interface
- 4.15 SD card interface
- 4.16 SDIO_WIFI/EMMC interface
- 4.17 PCIe interface
- 4.18 RMII/RGMII interface
- 4.19 AUDIO interface
- 4.20 ADC
- 4.21 GPIOs
- 4.22 Power on/off and reset interface
- 4.23 Antenna interface
- 5 Product characteristics
- 6 Design Guideline
- 7 Storage, Production and Package
- 8 Safety Information
- 空白页面
- 空白页面
L508 Hardware Design
Copyright© Shanghai Mobiletek Communication Ltd 55
4.13 Flight Mode
The FLIGHTMODE pin can be used to control the module to enter or exit flight mode. In flight mode,
the internal RF circuitry of the L508 is turned off (this feature requires special software support).
When the FLIGHTMODE PIN is low, the system goes into flight mode.
Table 26 FLIGHTMODE
Pin No. Pin Name I / O type Functional description
54 FLIGHTMODE DI Flight Mode Control Terminal
4.7K
FLIGHTMODE
4.7K
1.8V
Figure 28 FLIGHTMODE design schematic
4.14 Forced USB download interface
4.14.1 Pin Description
The L508 can be configured to enter forced USB download mode by pulling up 85 PIN.