Timeline for What are these letters (not X's) in the boolean inputs in this datasheet?
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| Oct 19, 2021 at 4:40 | comment | added | Kartman | The datasheet tells you all you need to know about E. It tells you about the setup time for the control and data to E going high. The min time for E to be high. The hold time for control and data and E low minimum time. Off the top of my head it us around 500ns min for E high or low. That’s a min period of 1us. All this has been done to death on the web - it really hasn’t changed since the hd44780 came out in the 80’s. | |
| Oct 19, 2021 at 0:07 | comment | added | jcu | SO hang on, pg 25 seems to say that I need to wait >37us between each 4+4 (8 total) bit inputs, but is ambiguous about whether I should do anything with the "E" input or how long the delays between each set of 4 bits should be. On the other hand, 27 says I need to Delay > 80us between 8 bits in total, but specifies that I should use "E" to signal each set of 4 bits? SO: 1. Do I use "E?" 2. Should the larger delay btwn each 8 bits be 80 or 37us? | |
| Oct 18, 2021 at 23:40 | comment | added | danirebollo | He said: " I'm trying to code the 4-bit initialization process this LCD (page 25) and I'm seeing two rows of bits, with the second containing letters I have not seen before " So I replied thinking about 'X'. AFTER EDIT, he adds: "(...) I have not seen before (N, F, D, C, B, I/D, and S)." So my question replies to first unespecified question. | |
| Oct 18, 2021 at 23:19 | comment | added | danirebollo | ok, my answer is covering the second part: "do I need to provide delaybetween the rows?", and the answer is no. BTW Hearth dont say nothing about timing as I did | |
| Oct 18, 2021 at 23:07 | comment | added | TonyM | OP said "not X's" in the question and your answer only covers 'X's. Downvoting until corrected, I'm afraid. Hearth's earlier answer already answered the question fully, anyway. | |
| Oct 18, 2021 at 23:03 | history | answered | danirebollo | CC BY-SA 4.0 |