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OLEDs / NHD-0420DZW-AB5 SPI Clarification
« on: December 05, 2014, 10:09:48 AM »
I am attempting to interface the above OLED display to an FPGA using the SPI interface and the display's data sheet is not very clear.  Was hoping someone could answer a few questions for me:

1) the data sheets timing diagram shows two 10bit words output back to back.  When sending a command to the display (for example "RETURN HOME") will I need to send the bit sequence twice as the data sheet suggests: "00000000100000000010" or can I just perform a single 10 bit transfer? 

2) If the command needs to be sent twice, what does the display return in the "VALID DATA" Byte?

3) When reading the Status register or a DDRAM location, is it possible to extend the transfer (keep CSB low) on a read operation to allow continuous reading of multiple DDRAM locations or continuously query the busy flag?

4) when writing to DDRAM, can I use a single transfer (keep CSB low) to write all 20 bytes of a line?  Would the address counter be automatically incremented?


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