Datasheet

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ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.
EA DOGS104-A
SERIAL INTERFACE (SPI, MODE3)
The serial interface always needs a synchronization byte. In write mode, the byte to send hast to be
devided in two bytes, into the “lower data“ and “upper data“. Please refer to the chart below. The
maximum clock frequency for SCLK is 1 MHz.
SPI, 1-/2-/3-WIRE
With 2 to 4 lines SCLK, SID and CS, SOD (if necessary) the display EA DOGS104-A may be
connected directly to the SPI interface of a µC.
I²C INTERFACE
The display can be assigned to the slave adress 0x78 (SA0=0) or 0x7A (SA0=1). After transfering
the start condition, the hardware adress, togehter with the Read(1)/Write(0) bit has to be transmitted.
While writing to the display, after the slave adress, there always is a control byte holding the information
Data(1) or Command(0) and the continuation bit. If the continuation bit is set to 0, the following bytes
are data bytes until the next stop condition occurs. The maximum clock rate for I²C bus is 400 kHz.
Further information about the interfaces and the timing of the SSD1803A, please refer to the datasheet
http://www.lcd-module.de/fileadmin/eng/pdf/zubehoer/ssd1803a_2_0.pdf