Data Sheet

www.waveshare.com

25／40

Pin Name

Data/Command Interface

Control Signal

Bus interface

CS#

D/C#

RES#

SPI4

SDin

SCLK

CS#

D/C#

RES#

SPI3

SDin

SCLK

CS#

RES#

7-3) Panel AC Characteristics

7-3-1) MCU Interface

7-3-1-1) MCU Interface Selection

In this module, there are 4-wire SPI and 3-wire SPI that can communicate with MCU. The MCU interface mode can be set by hardware

selection on BS1 pins. When it is “Low”, 4-wire SPI is selected. When it is “High”, 3-wire SPI (9 bits SPI) is selected.

Note 7-2: L is connected to VSS

Note 7-3: H is connected to VCI

Table 7-4-1-1: MCU interface assignment under different bus interface mode