1. Module Pin Definitions

1.1 20-Pin Module (QSPI / SPI)

Pin	Signal	Direction	Function
1	GND	-	Ground
2	VCC	Power	3.3V power supply
3	GND	-	Ground
4	CS#	MCU → Screen	Chip select, active low
5	GND	-	Ground
6	DB1	Bidirectional	SPI: MISO / QSPI: DATA1
7	RD#	MCU → Screen	SPI: MOSI / QSPI: DATA0
8	WR#	MCU → Screen	SPI/QSPI serial clock (SCLK)
9	DB3	Bidirectional	QSPI: DATA3
10	DB2	Bidirectional	QSPI: DATA2
11	RESET#	MCU → Screen	Reset, active low
12	WAIT#	Screen → MCU	Busy status indicator; low level means commands can be sent
13	NC	-	No connection
14	D/C#	MCU → Screen	Command/data select (0 = command, 1 = data)
15	TP-INT	TP → MCU	Touch interrupt
16	TP-SDA	Bidirectional	Touch I2C data line
17	TP-SCL	MCU → TP	Touch I2C clock line
18	TP-RST	MCU → TP	Touch reset
19	TP-VCC	Power	Touch 3.3V power supply
20	GND	-	Ground

1.2 30-Pin Module (QSPI / SPI)

Pin	Signal	Direction	Function
1	GND	-	Ground
2	GND	-	Ground
3	VCC	Power	3.3V power supply
4	VCC	Power	3.3V power supply
5	GND	-	Ground
6	CS#	MCU → Screen	Chip select, active low
7	GND	-	Ground
8	DB1	Bidirectional	SPI: MISO / QSPI: DATA1
9	RD#	MCU → Screen	SPI: MOSI / QSPI: DATA0
10	GND	-	Ground
11	WR#	MCU → Screen	SPI/QSPI serial clock (SCLK)
12	GND	-	Ground
13	DB3	Bidirectional	QSPI: DATA3
14	DB2	Bidirectional	QSPI: DATA2
15	GND	-	Ground
16	RESET#	MCU → Screen	Reset, active low
17	DBGTX	MCU → Screen	Debug UART TX
18	DBGRX	Screen → MCU	Debug UART RX
19	WAIT#	Screen → MCU	Busy status indicator; low level means commands can be sent
20	IM0	MCU → Screen	Interface mode select
21	IM1	MCU → Screen	Interface mode select
22	NC	-	No connection
23	RS	MCU → Screen	Command/data select (D/C#)
24	GND	-	Ground
25	TP-INT	TP → MCU	Touch interrupt
26	TP-SDA	Bidirectional	Touch I2C data line
27	TP-SCL	MCU → TP	Touch I2C clock line
28	TP-RST	MCU → TP	Touch reset
29	TP-VCC	Power	Touch 3.3V power supply
30	GND	-	Ground

1.3 40-Pin Module (QSPI / 8080)

Pin	Signal	Direction	Function
1	GND	-	Ground
2	GND	-	Ground
3	VCC	Power	3.3V power supply
4	VCC	Power	3.3V power supply
5	DB0	Bidirectional	8080: Data0
6	DB1	Bidirectional	SPI: MISO / 8080: Data1
7	DB2	Bidirectional	8080: Data2
8	DB3	Bidirectional	8080: Data3
9	DB4	Bidirectional	8080: Data4
10	DB5	Bidirectional	8080: Data5
11	DB6	Bidirectional	8080: Data6
12	DB7	Bidirectional	8080: Data7
13	WR#	MCU → Screen	Write strobe, latched on rising edge
14	RD#	MCU → Screen	SPI: MOSI / QSPI: DATA0 / 8080: read strobe (active low)
15	CS#	MCU → Screen	Chip select, active low
16	D/C#	MCU → Screen	Command/data select (0 = command, 1 = data)
17	RESET#	MCU → Screen	Reset, active low
18	DBGTX	MCU → Screen	Debug UART TX
19	DBGRX	Screen → MCU	Debug UART RX
20	WAIT#	Screen → MCU	Busy status indicator; low level means commands can be sent
21	IM0	MCU → Screen	Interface mode select
22	IM1	MCU → Screen	Interface mode select
23	QSPI-INT/8080-INT	Screen → MCU	Interrupt request
24	DB8	Bidirectional	8080: Data8
25	DB9/SDO1	Bidirectional	8080: Data9 / QSPI: DATA1
26	DB10/SDO2	Bidirectional	8080: Data10 / QSPI: DATA2
27	DB11/SDO3	Bidirectional	8080: Data11 / QSPI: DATA3
28	DB12	Bidirectional	8080: Data12
29	DB13	Bidirectional	8080: Data13
30	DB14	Bidirectional	8080: Data14
31	DB15	Bidirectional	8080: Data15
32	GND	-	Ground
33	GND	-	Ground
34	TP-RST	MCU → TP	Touch reset
35	TP-INT	TP → MCU	Touch interrupt
36	TP-SCL	MCU → TP	Touch I2C clock line
37	TP-SDA	Bidirectional	Touch I2C data line
38	TP-VCC	Power	Touch 3.3V power supply
39	GND	-	Ground
40	GND	-	Ground

2. Hardware Connection

SPI Mode (5 wires)

Signal	Direction	Function
CS	MCU → Screen	Chip select, active low
SCLK	MCU → Screen	Serial clock
MOSI	MCU → Screen	Master output (commands/data)
D/C	MCU → Screen	Command/data select (0 = command, 1 = data)
REST	MCU → Screen	Reset, active low

QSPI Mode (6 wires)

Signal	Direction	Function
CS	MCU → Screen	Chip select, active low
SCLK	MCU → Screen	Serial clock
IO0~IO3	MCU → Screen	Bidirectional data lines; four-line parallel transfer during the data phase

8080 Mode

Signal	Direction	Function
CS	MCU → Screen	Chip select, active low
WR	MCU → Screen	Write strobe, data latched on rising edge
RD	MCU → Screen	Read strobe, active low
D/C	MCU → Screen	Command/data select (0 = command, 1 = data)
D0~D7 / D0~D15	Bidirectional	8-bit or 16-bit parallel data bus

Connection Requirements:

1. Host IO levels must match the module (TR230S IO level is 3.3V); add level shifting if levels differ;
2. Keep signal traces as short and length-matched as possible. In QSPI/8080 high-speed modes, a 22Ω series matching resistor on the data lines is recommended to suppress reflections and ringing;
3. For control lines such as CS, SCLK, and WR, add 4.7~10kΩ pull-ups near the MCU side to prevent false triggering at power-on;
4. Place decoupling capacitors close to the power supply pins;
5. Power polarity must be correct — never reverse the connector pin order, or the module may be damaged;

3. Power Supply Requirements and Power Consumption

• Supply voltage: 5V DC
• Typical power consumption: The TR230S chip's typical power consumption is < 200mW; total module power consumption depends on backlight brightness, typically between 0.5W and 5W.
• Power supply recommendations:
  • Small modules (≤ 4.0"): a 5V / 500mA power supply is sufficient;
  • Large modules (≥ 5.0"): a 5V / 1A or higher power supply is recommended, as current demand is higher at full backlight brightness;
  • If powering from an MCU development board, verify that its 5V output current capability is sufficient; otherwise use a separate power supply.

4. Setting the Working Mode

IM1	IM0	mode	Corresponding Log
0	0	SPI	Bus mode: SPI 4-Wire,
0	1	QSPI	Bus mode: SPI 4-SDA,
1	0	8080-8B	Bus mode: 8080 X8,
1	1	8080-16B	Bus mode: 8080 X16,

1. Determine the mode by checking the IM0 & IM1 pin levels
2. Determine the mode from the system boot log

5. Introduction to Drive Methods

This module is compatible with multiple communication interfaces, including SPI, QSPI, and 8080. After power-on, complete the initialization as follows:

• ① Pin configuration: Complete the wiring according to the hardware pin definitions, and first configure the logic levels and timing of the CS (chip select) pin and the D/C (command/data select) pin;
• ② Backlight enable: Write 0x64 to register 0x20 to enable the backlight and configure its parameters;
• ③ Display area setting: Configure register 0x2A to set the horizontal active display area and register 0x2B to define the vertical active display area;
• ④ Frame refresh: After the window parameters are configured, batch-send image display data through register 0x2C to refresh the screen.

Functional definitions and detailed configuration guidelines for all registers can be found in the corresponding chip datasheet. datasheet
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