MCU interface support 480*800 display

MCU interface standard name is I80, mainly for the field of microcontrollers in use.
The standard term for MCU-LCD interface is the 8080 bus standard proposed by Intel.
MCU interface can be mainly divided into 8080 mode and 6800 mode, the main difference between the two is the timing: data bit transfer 8-bit, 9-bit, 16-bit, 18-bit, 24-bit; connected lines are divided into: CS /, RS (register selection), RD /, WR /, the rest is the transmission of data lines.

Advantages: simple and convenient control, no need for clock and synchronization signal.
Disadvantages: occupy a lot of GRAM resources, display refresh rate is not enough, can not do more than 480 × 800 resolution.

ILI9806 1.Support resolution:WVGA
2.Compatible with panel technology:a-Si
I/F:MIPI-DBI/MIPI-DPI/MIPI-DSI/MIDI/SPI
4.RAM or RAMLESS:Full RAM
Basic input/output voltage: IOVCC=1.65~3.3V; VCI=2.6~3.3V
6.Status:MP
ILI9806HSupport resolution: WVGA
2.Compatible with panel technology: a-Si
I/F: MIPI-DBI/MIPI-DPI/MIPI-DSI/SPI 16bits
4.RAM or RAMLESS:1/2 RAM
Basic input/output voltage: IOVCC=1.65~3.3V; VCI=2.6~3.3V
Status:MP

Market demand, there are solutions, display driver IC Taiwan manufacturers, such as Wing NT35510, ILI9806 can support FULL RAM or 1/2 RAM to make up for the GRAM resources, 480X800 resolution display, you can do to support MCU interface and flip display.
For MCU interface LCD, its internal chip is called LCD driver IC, the main function is to transform the data/command sent by the motherboard into RGB data for each pixel, so that it can be displayed on the screen. This process does not require a point, line, or frame clock.
The Driver IC of the MCU interface LCD is equipped with GRAM. The Driver IC acts as a co-processor of the MCU, accepting the Command/Data sent by the MCU, and can work relatively independently. For MCU interface LCD, the internal chip is called LCD driver IC, whose main function is to transform the data/commands sent by the motherboard into RGB data for each pixel and display it on the LCD screen. This process does not require a point, line, or frame clock.

I (intel) 8080 mode
I80 mode pins have 5 control pins: CS,RS,/WR,/RD RESET
Pros: Simple and convenient control, no need for clock and synchronization signal.
Disadvantages: It consumes GRAM resources and cannot achieve a resolution of 480×800 or higher.

The above models can be perfectly solved by Uniwings NT35510, Sunplus OTM8009A, Chipset HX8363B, and ILI9806.

M(Motorola) 6800 mode
M6800 mode supports selectable bus width 8/9/16/18-bit (default is 8-bit). The actual design idea is the same as that of I80, the main difference is that the bus control read/write signal of this mode is combined on one pin (/WR), and a latch signal (E) is added for data bit transmission with 8-bit, 9-bit, 16-bit and 18-bit.
The main differences between MCU interface and RGB interface are
MCU interface method: Display data is written to DDRAM, which is commonly used for static picture display.
RGB interface method: display data is not written to DDRAM, direct display, fast speed, often used for displaying video or animation.

MCU interface does not support 480X800 resolution LCD, display driver IC manufacturers, such as Wing NT35510, ILI9806 can support FULL RAM or 1/2 RAM to make up for GRAM resources, 480X800 resolution display, you can do to support MCU interface and flip display.

Date:2022-9-15 Author:6494350@qq.com

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