A straightforward approach is to use Google:
| Parameter | Symbol | Min | Max | Unit |
| :--- | :--- | :--- | :--- | :--- |
| Analog Supply Voltage | VDD_AMP | -0.3 | 14.0 | V |
| Logic Input Voltage | VIN | -0.3 | VDDI + 0.3 | V |
| Operating Temperature | TOP | -40 | 105 | °C |
Note: Exceeding 14V on VDD_AMP instantly destroys the source amplifiers.
Original: Writing to gamma registers via SPI at >70°C would sometimes fail, requiring a hard reset.
UPD Fix: Revised SPI timing (t_CLK high minimum increased from 50ns to 75ns). The updated datasheet shows a new pull-up recommendation on the SDA line.
The first place to look for a datasheet is the official website of the manufacturer. If you know who manufactured the HX8872F, you can visit their website and search for the product. Most manufacturers provide datasheets in PDF format for download.
This is a typical initialization script derived from the HX8872F UPD firmware notes. It corrects the known Rev A bugs.
// HX8872F Initialization Sequence (UPD Revision C)
void HX8872F_Init(void)
// 1. Hardware Reset
HAL_GPIO_WritePin(RESET_GPIO, RESET_PIN, GPIO_PIN_RESET);
HAL_Delay(10);
HAL_GPIO_WritePin(RESET_GPIO, RESET_PIN, GPIO_PIN_SET);
HAL_Delay(120); // UPD: Increased delay from 50ms to 120ms
// 2. Exit Sleep Mode
LCD_Write_Cmd(0x11); // Sleep Out
HAL_Delay(120); // UPD: Wait for oscillator stabilization
// 3. UPD Patch: Dummy Read to fix wake-up bug
LCD_Read_Reg(0x0A); // Read status
// 4. Set Pixel Format (18-bit RGB)
LCD_Write_Cmd(0x3A);
LCD_Write_Data(0x66); // 18-bit
// 5. UPD Gamma Setting (Corrects for cold start flicker)
LCD_Write_Cmd(0xB0); // Gamma Enable
LCD_Write_Data(0x00);
LCD_Write_Cmd(0xB1); // Positive Gamma
uint8_t gamma_pos[] = 0x0F, 0x24, 0x3F, 0x50, 0x60, 0x70, 0x7F;
for(int i=0; i<7; i++) LCD_Write_Data(gamma_pos[i]);
// 6. Display On
LCD_Write_Cmd(0x29);
Hx8872f+datasheet+pdf+upd 〈100% Proven〉
A straightforward approach is to use Google:
| Parameter | Symbol | Min | Max | Unit |
| :--- | :--- | :--- | :--- | :--- |
| Analog Supply Voltage | VDD_AMP | -0.3 | 14.0 | V |
| Logic Input Voltage | VIN | -0.3 | VDDI + 0.3 | V |
| Operating Temperature | TOP | -40 | 105 | °C |
Note: Exceeding 14V on VDD_AMP instantly destroys the source amplifiers. hx8872f+datasheet+pdf+upd
Original: Writing to gamma registers via SPI at >70°C would sometimes fail, requiring a hard reset.
UPD Fix: Revised SPI timing (t_CLK high minimum increased from 50ns to 75ns). The updated datasheet shows a new pull-up recommendation on the SDA line.
The first place to look for a datasheet is the official website of the manufacturer. If you know who manufactured the HX8872F, you can visit their website and search for the product. Most manufacturers provide datasheets in PDF format for download. A straightforward approach is to use Google: |
This is a typical initialization script derived from the HX8872F UPD firmware notes. It corrects the known Rev A bugs.
// HX8872F Initialization Sequence (UPD Revision C)
void HX8872F_Init(void)
// 1. Hardware Reset
HAL_GPIO_WritePin(RESET_GPIO, RESET_PIN, GPIO_PIN_RESET);
HAL_Delay(10);
HAL_GPIO_WritePin(RESET_GPIO, RESET_PIN, GPIO_PIN_SET);
HAL_Delay(120); // UPD: Increased delay from 50ms to 120ms
// 2. Exit Sleep Mode
LCD_Write_Cmd(0x11); // Sleep Out
HAL_Delay(120); // UPD: Wait for oscillator stabilization
// 3. UPD Patch: Dummy Read to fix wake-up bug
LCD_Read_Reg(0x0A); // Read status
// 4. Set Pixel Format (18-bit RGB)
LCD_Write_Cmd(0x3A);
LCD_Write_Data(0x66); // 18-bit
// 5. UPD Gamma Setting (Corrects for cold start flicker)
LCD_Write_Cmd(0xB0); // Gamma Enable
LCD_Write_Data(0x00);
LCD_Write_Cmd(0xB1); // Positive Gamma
uint8_t gamma_pos[] = 0x0F, 0x24, 0x3F, 0x50, 0x60, 0x70, 0x7F;
for(int i=0; i<7; i++) LCD_Write_Data(gamma_pos[i]);
// 6. Display On
LCD_Write_Cmd(0x29);