SF32LB52-DevKit-LCDAdapter board制作Guide¶
This article guides how to make a matching adapter board for the SF32LB52-DevKit-LCD development board to debug third-party displays, WiFi modules, etc.。
QSPI-LCDInterfaceAdapter board¶
The QSPI-LCD adapter board can be connected from a 22-pin FPC socket or from a 40-pin dual-row pin connector.。
22pin FPC转接方式¶
The 22-pin FPC socket of the SF32LB52-DevKit-LCD development board supports MIPI-DBI (8080) and SPI (3/4 wire, 2/4 data) interfaces, and the data format can be adapted by configuring the IO MUX through software.。
The SF32LB52-DevKit-LCD development board provides one LED driver with a default driving current of 40mA. The driving current of the LED can be adjusted by changing the resistance value of R0110 according to the LED circuit structure and current requirements of the LCD display.。
Important
The adapter board is connected to the SF32LB52-DevKit-LCD development board via an FPC ribbon cable. When designing, pay attention to the FPC wiring sequence on the adapter board, which needs to be crossed with the signal definition on the development board.。
The VDD_3V3 power supply in the FPC connector interface can power the screen driver and touch driver on the adapter board.。
The IO level of the development board is 3.3V. If the IO level of the driver chip on the LCD adapter board is 1.8V, please use a Level shift chip to convert the level。
If the adapter board needs a 5V power supply, please use a 40p double row pin as the adapter interface.。
The display interface on the development board has already been connected with resistors, so there is no need to add resistors on the adapter board。
40pin 双排针转接方式¶
Important
The adapter board is connected to the SF32LB52-DevKit-LCD development board via a 40-pin dual-row connector, and the adapter board is mounted on top of the development board。
The 3V3 and 5V power supply in the 40-pin dual-row connector can power the screen driver and touch driver on the adapter board。
The IO level of the development board is 3.3V. If the IO level of the driver chip on the LCD adapter board is 1.8V, please use a Level shift chip to convert the level。
The adapter board needs to integrate a display backlight circuit。
The display interface on the development board has already been connected with resistors, so there is no need to add resistors on the adapter board。
MIPI-DBI(8080) interface adapter board¶
Refer to the QSPI-LCD interface adapter board section