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 42
VCC
R8
C2
RST
CLK
DATA
DETECT
R9
R10
R11
C3 C4
VPP
USIM_VDD
USIM_RST
USIM_DATA
USIM_CD
USIM_CLK
C5 C6
22R
22R
22R
22R
22PF22PF22PF
ESD
33PF 100NF
MODULE
SIM
GND
Figure 12 SIM Card Signal Connection Circuit
Note: 1. The pull-up resistors on the USIM signal lines have been designed in the module without the
need to add the pull-up resistors in the peripheral circuit design.
2. The L508 supports a hot-swap design, so if you don't need one, just leave the SIM empty.
4.6 PCM interface
4.6.1 Pin Description
The L508 module provides a digital audio interface (PCM) to transmit digital voice signals as the PCM
main device. The Pin signals are shown in the following table: