Data Sheet

Product Specification
Ver 1.2  28 / 43
7-3-2-2) MCU Serial Interface (4-wire SPI)
The 4-wire SPI consists of serial clock SCL, serial data SDA, DC, CSB. In SPI mode, D0 acts as SCL, D1 acts as SDA.
Table 7-2: Control pins of 4-wire Serial Peripheral interface
Note 7-4: ↑stands for rising edge of signal
SDA is shifted into an 8-bit shift register in the order of D7, D6, ... D0. The data byte in the shift register is written to the Graphic Display Data
RAM (RAM) or command register in the same clock. Under serial mode, only write operations are allowed.
Figure 7-1: Write procedure in 4-wire Serial Peripheral Interface mode
Function CSB DC SCL
Write Command L L ↑
Write data L H ↑
.
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