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 35
Table 10 operating conditions of module
Description Functional description Min Typ Max Unit
USB_VBUS USB power detect 3.5 5 5.5 V
VBAT Module main power 3.4 3.8 4.2 V
4.3 Digital logic characteristics
Table 11 Digital I/O characteristics (VDD=1.8V)
Symbols Description Min Typ Max Unit
VIH High-level input voltage 0.7*VDD VDD VDD+0.2 V
VIL Low-level input voltage -0.3 0 0.3* VDD V
VOH High-level output voltage VDD-0.2 - VDD V
VOL Low-level output voltage 0 0 0.2 V
Note: 1. VDD1V8, USIM (voltage 1.8V), RMII (voltage 1.8V), MMC_SD (1.8V) meet the above
characteristics.
2. The internal power supply of I2C, PCM, GPIOS and UART is VDD1V8.
Table 12 Digital I/O characteristics (VDD=3V/3.3V)
Symbols Description Min Typ Max Unit
VIH High-level input voltage 2 VDD VDD+0.3 V
VIL Low-level input voltage -0.3 0 0.8 V
VOH High-level output voltage 2.4 - VDD V
VOL Low-level output voltage 0 0 0.4 V
Note: 1. USIM (voltage 3.0V), RMII (voltage 3.3V), MMC_SD (3.0V) meet the above characteristics.
2. USIM_CD, MMC1_CD do not support dual voltage, their digital level is 1.8V.