ILI9325 TFT LCD controller pinout · HY32D · CNA / CNB · 34 contacts

HY32D · CNA / CNB · 34 contacts pinout

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

2 · GND

Supply return · Ground

Ground for the 5 V main-supply input. The manufacturer leaves pin 2 open in the 3.3 V configuration.

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

Electrical limits · Link to this pin

All 34 pins

Pin	Signal	Direction	Function
1	5V Supply input	Supply input	Use only in the 5 V main-supply configuration. Leave this contact open when applying 3.3 V at pin 33.
2	GND Supply return	Supply return	Ground for the 5 V main-supply input. The manufacturer leaves pin 2 open in the 3.3 V configuration.
3	D0 Bidirectional	Bidirectional	Parallel display data bit 0.
4	D1 Bidirectional	Bidirectional	Parallel display data bit 1.
5	D2 Bidirectional	Bidirectional	Parallel display data bit 2.
6	D3 Bidirectional	Bidirectional	Parallel display data bit 3.
7	D4 Bidirectional	Bidirectional	Parallel display data bit 4.
8	D5 Bidirectional	Bidirectional	Parallel display data bit 5.
9	D6 Bidirectional	Bidirectional	Parallel display data bit 6.
10	D7 Bidirectional	Bidirectional	Parallel display data bit 7.
11	D8 Bidirectional	Bidirectional	Parallel display data bit 8.
12	D9 Bidirectional	Bidirectional	Parallel display data bit 9.
13	D10 Bidirectional	Bidirectional	Parallel display data bit 10.
14	D11 Bidirectional	Bidirectional	Parallel display data bit 11.
15	D12 Bidirectional	Bidirectional	Parallel display data bit 12.
16	D13 Bidirectional	Bidirectional	Parallel display data bit 13.
17	D14 Bidirectional	Bidirectional	Parallel display data bit 14.
18	D15 Bidirectional	Bidirectional	Parallel display data bit 15.
19	CS Input	Input	Active-low display select.
20	RS Input	Input	Selects register index or data. Follow the controller timing and verify polarity with a device-code read.
21	WR Input	Input	Active-low write strobe.
22	RD Input	Input	Active-low read strobe.
23	RESET Input	Input	Active-low hardware reset.
24	NC None	None	Reserved contact. Leave open.
25	BLVCC Supply input	Supply input	Separate 5 V input for the backlight circuit.
26	BLGND Supply return	Supply return	Backlight supply return.
27	BLCNT Input	Input	PWM backlight control through the onboard driver.
28	TP_IRQ Output	Output	Active-low touch interrupt.
29	TP_CS Input	Input	Active-low touch-controller select.
30	TP_SCK Input	Input	Touch-controller SPI clock.
31	TP_SI Input	Input	Host-to-touch-controller SPI data.
32	TP_SO Output	Output	Touch-controller-to-host SPI data.
33	3.3V Supply input or output	Supply input or output	Use as supply input with pins 1 and 2 left open. When the 5 V input is used, this is the regulated output.
34	GND Supply return	Supply return	Connect to host ground.

Signal assignments

16-bit parallel display bus

Use a bidirectional host bus for reads and writes. The display register index and 16-bit register payload are separate cycles.

Resistive touch SPI

The touch controller uses independent SPI and interrupt signals.

Electrical limits

Parameter	Limit	Conditions and source
Main supply3.3 V or 5 V	3.3 V or 5 V	Connect either main input configuration according to the schematic. Use 3.3 V display logic in the fixture. HAOYU STAR HY32D-ILI9325 pin description and HY32D schematic, CNA/CNB and separate backlight regulator.
Backlight input5 V	5 V	Separate BLVCC and BLGND contacts feed the onboard circuit. HAOYU STAR HY32D-ILI9325 pin description and HY32D schematic, CNA/CNB and separate backlight regulator.
Panel pixels240 × 320	240 × 320	Portrait coordinates. Module documentation lists the rotated 320 × 240 format. HAOYU STAR HY32D-ILI9325 pin description and HY32D schematic, CNA/CNB and separate backlight regulator.

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.

HAOYU HY32D-ILI9325 manufacturer documentation· HAOYU STAR HY32D-ILI9325 pin description and HY32D schematic, CNA/CNB and separate backlight regulator.
ILI9325 controller datasheet· ILI Technology ILI9325 v0.43 pin descriptions and MCU interface timing. Manufacturer PDF hosted by Adafruit.
HY32D module schematic· HAOYU’s CNA/CNB assignments, alternate main-supply inputs, and separate 5 V backlight power.