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NJU3426

(5) SERIAL DATA TRANSMISSION

Communication between the NJU3426 and MPU uses the serial data transmission with synchronous clock, and 8 bits

serial data constitutes 1 word.

Each bit on the SI pin is fetched at the rising edge of the serial clock (SCK), and the

entire 8 bits are loaded as 1 word at the rising edge of the chip select (CSb).

During one communication, multiple words can be transferred continuously. The 1

RAM address”, “Command register 1” or “Command register 2”.

When the 1

ascending words must be display data.

When it’s the “Command register 1 or 2”, the 2

ignored.

SERIAL DATA TIMING

SERIAL DATA TRANSMISSION FORMAT

•

Serial input data

DATA FORMAT FOR THE 1

DISPLAY DATA RAM ADRESS

B7

B6

B5

B4

B3

B2

B1

B0

0

0

*

AD4

AD3

AD2

AD1

AD0

*:don’t care

COMMAND DATA 1

B7

B6

B5

B4

B3

B2

B1

B0

1

DT2

DT1

DT0

DSP

DE2

DE1

DE0

*:don’t care

COMMAND DATA 2

B7

B6

B5

B4

B3

B2

B1

B0

0

1

*

*

DS3

DS2

DS1

DS0

*:don’t care

SERIAL DATA FOR THE 2

When the 1

When the 1

SCK

SI

D0

D1

D2

D3

D4

D5

D6

D7

SCK

WO

CSb

SI