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 50
Figure 22 UART to RS232 reference circuit
4.9 SPI interface
4.9.1 Pin Description
L508 module provides two sets of SPI interface, as the main device, SPI signal frequency up to
52MHz, wherein 6-9 PIN can be displayed by SPI LCD. SPI interface signals are shown in the
following table.
Table 20 SPI interface definitions
Pin No. Pin Name I / O type Functional description
6 SPI_CLK DO SPI clock
7 SPI_MISO DI SPI input data
8 SPI_MOSI DO SPI output data
9 SPI_CS DO SPI chip select
73 PCM_OUT DO SPI output data
74 PCM_IN DI SPI input data
75 PCM_SYNC DO SPI chip select
76 PCM_CLK DO SPI clock
4.9.2 SPI reference design
The voltage range of SPI serial port is 1.8V.
SLAVE
SPI_MISO
SPI_CLK
MODULE
SPI_CS_N
SPI_MOSI
SPI_MOSI
SPI_CLK
SPI_CS_N
SPI_MISO
MASTER