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Capacitive touch screen driver board based on CH554G chip solution

Overview

The CH554 chip is an enhanced E8051 core microcontroller compatible with the MCS51 instruction set. 79% of the instructions are single-byte single-cycle

Its instructions, on average, are 8½15 times faster than the standard MCS51. CH554 supports the highest system frequency of 24MHz, built-in ½ 16K program memory ROM and 256 bytes of internal iRAM and 1K bytes of on-chip xRAM. xRAM supports DMA direct memory access. CH554 has built-in ADC analog-to-digital conversion, touch button capacitance detection, 3 sets of timers and signal capture and PWM, dual asynchronous serial ports, SPI and other functional modules, and supports USB-Host host mode and USB-Device device mode.

This project uses the CH554G chip. After burning the program, it can drive the GT series capacitive screen.

The new C port leads to the ROM short interface and the screen wire flying wire solder joints. The wire sequence can be reordered by flying wires between the resistors. Double-sided panel, single-sided soldering chip, long strip shape.

The resistor and capacitor are packaged in 0603.

The win10 system can support 10-point touch.

PCB preview

The plate making files and burning tools are in the attachment

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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