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ILI9325 TFT LCD controller connection guide

ILI9325 TFT LCD controller HY32D · CNA / CNB · 34 contacts wiring guide with power, signal assignments, and bench checks.

HY32D · CNA / CNB · 34 contacts

34 contacts Current package

ILI Technology ·

Connect a 3.3 V 16-bit host

Required

Supply the display logic through pin 33 and use pin 34 as its return. Leave pins 1 and 2 open in this configuration. Power the backlight through BLVCC and BLGND, and use a 3.3 V PWM signal for BLCNT.

Bench checks

  • Before power-up, confirm that only the selected main supply contacts are connected. With power on, measure 3.3 V at pin 33 and 5 V at BLVCC.
  • Read device register 0x00 using the ILI9325 bus sequence. It should return 0x9325. If the read is wrong, check bus direction and RS timing before sending the initialization sequence.
  • Run the HAOYU example initialization and fill the panel with a known RGB565 color.

HAOYU STAR HY32D-ILI9325 pin description and HY32D schematic, CNA/CNB and separate backlight regulator. ILI Technology ILI9325 v0.43 pin descriptions and MCU interface timing. Manufacturer PDF hosted by Adafruit.

HY32D · CNA / CNB · 34 contacts wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

Mating contact view, oriented with the documented pin-1 end at the top and the odd contact row to the left. Check the board’s index before mating.
Selected pin details

1 · 5V

Supply input · Power

Use only in the 5 V main-supply configuration. Leave this contact open when applying 3.3 V at pin 33.

HAOYU STAR HY32D-ILI9325 pin description and HY32D schematic, CNA/CNB and separate backlight regulator.

Electrical limits · Pin in the reference

Models and documents

The map covers the HAOYU HY32D-ILI9325 CNA and CNB host headers, which have the same 34-contact assignment. Identify the controller on the installed panel before loading initialization code.

HY32D-ILI9325
HAOYU 3.2-inch display module with ADS7843 or XPT2046 touch controller.