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 52
MODULE
UART_DCD
VDDIO
LCD
VCC_2.8V
VCC
VIO
1uF 1uF
LE DA
LE DK
LCD_BK_EN
RESET
SPI_CS
CS
SPI_M O SI
UART _DT R
SPI_CLK
SDA
RS
GND
SCK
GND
背光驱动
VBAT
Figure 25 LCD reference design
4.10 I2C interface
The control interface of I2C used to communicate with peripheral devices, SDA and SCL are two-way
communication lines, running voltage is 1.8 v, high-speed mode transmission rate can reach 3.3Mbps,
since the internal L508 has done the pull-up of I2C interface, so the external pull-up design is not
needed.
Table 22 I2C interface definitions
Pin No. Pin Name I / O type Functional description
55 I2C_SCL B_PU I2C clock, Internal 4.7K pull up
56 I2C_SDA B_PU I2C data, Internal 4.7K pull up