1, 3.5-inch touch color screen TFT power supply: the screen power supply is 2.8-3.3V; remember not to use 5V (the module with PCB has inherited 3V voltage regulator IC, and can input 5V) backlight voltage is up to 3.2V, and 20R can be connected in series under 3.3V power supply -50R current limiting resistor.
2. This TFT is compatible with 8/16-bit data interface. The switching method is realized by R1 and R2 on the cable. The 0 ohm resistor shorts R1 for 16-bit mode, shorts R2 for 8-bit mode, and the upper 8 bits (ie DB8-DB15) are used in 8-bit mode. Starting from March 17, 2010, the default delivery is 16-bit interface. If you need an 8-bit interface, please notify the owner before shipping, otherwise you need to change it yourself.
3. Data port level: Theoretically, the data port level should not exceed 3.3V. If you must use a 5V microcontroller IO to connect to the data bus, because there is a voltage clamp inside the tft, it can be used, but it is always irregular. . Experiments and sample tests can be done. When making products in batches, in order to improve product stability, it is best to use a low-voltage single-chip microcomputer or add a level conversion IC. (AVR's IO output has a strong high-level ability, and the internal TFT data bus The voltage clamping capability of the AVR is limited. When using an AVR driver, please use 3.3V to power the microcontroller. If you must use a 5V power supply AVR, please add a level conversion IC)
(The I0 of the AVR has a strong high-level output capability, and the internal voltage clamping capability of the TFT data bus is limited. When using the AVR driver, please use 3.3V to power the microcontroller. If you must use a 5V power supply AVR, please add the level Conversion IC)
