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 51
Figure 23 SPI connection diagram 1
SLAVE
SPI_MISO
SPI_CLK
MODULE
SPI_MOSI
SPI_MOSI
SPI_CLK
SPI_MISO
MASTER
Figure 24 SPI connection diagram 2
4.9.3 LCD reference design
The L508's SPI signal supports both 4-wire 8bit and 3-wire 9bit LCD. The maximum resolution is
dependent on the frame rate of the LCD, and the maximum frame rate supported by a 240×320
screen is about 18fps.
Table 21 LCD interface definitions
Pin No. Pin Name I / O type Functional description
6 SPI_CLK DO SPI clock
8 SPI_MOSI DO SPI output data
9 SPI_CS DO SPI chip select
70 UART_DCD DO LCD reset signal
72 UART_DTR DO LCD data/command (D/CX)
112 LCD_BK_EN DO PWM for LCD backlight