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 71
4.22 Power on/off and reset interface
4.22.1 Pin Description
When the VBAT is in normal state(3.4<VBAT<4.2), the Module will be powered on by the following
two ways:
Pulling the PWRKEY low more than 0.5s, then release
Pulling the EXTON1N low
Any of the above events will trigger system power on.
There are two ways to reset the module. Pulling the PWRKEY long time, will reboot the PMIC, PMIC
powered on will reboot the CPU;
Pulling the PWRKEY long time, will reboot the PMIC, PMIC powered on will reboot the CPU
Pulling the RESET, will reboot the CPU
Interface definitions are shown in the following table:
Table 37 boot and reset key interface definitions
Pin No. Pin Name I / O type Functional description
3 EXTON1N AI Power-on trigger, level trigger (active low)
4 RESET DI reset input. Active low
86 PWRKEY AI
Input pad generally connected to a keypad
power-on Button. Active low
Note: The pull-up voltage of PWRKEY and EXTON1N was consistent with that of VBAT, and the
pull-up voltage of RESET was 1.8V.