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Messages - joestaudt

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1
Michael,

A quick (I hope) follow-on question. Each instruction takes a certain amount of time to complete (26.3 usec for most, with a 380kHz clock). When I write to DDRAM, do I have to delay that amount of time between the address instruction and the first write instruction, and then after each write instruction? Or can all the data words be sent with no delay between?

Also, back on the RS signal, the timing diagram shows RS going active with the last bit of the previous word. Does it have to go active (and inactive?) that far ahead, or can it go active on the same (falling) clock edge as the first bit of the data word and inactive after the last bit?

Joe

2
Michael,

Thanks for the clarification. The timing diagrams in the spec showed RS as a pulse, and there is nothing that shows or describes a multiple-data transfer. It was rather confusing.

Joe

3
I have a question about the use of the RS line for the serial interface, and about writing data in general.

First, can I send multiple bytes of data following a command to set the DDRAM address, or must I send command, data byte, command, data byte, command, data byte, etc.

Second, if I can send multiple data bytes following a single command, do I need to pulse the RS line for each data byte, or do I only need to pulse it for the first data byte?

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