Some versions of the TI MSP430 have a built-in LCD driver. I was wondering if and how I can drive a custom hybrid dot-matrix / segment display with it. Does anyone have any experience with this?
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20 years ago
MSP430: can i drive a dot-matrix display?
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- posted
20 years ago
The MSP430 LCD ports are designed to drive LCD segment displays, up to about 96 segments. If your dot matrix has this number of dots or less, OK, the thing will look like a BW version of one of these new phones.
Paul Burke
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20 years ago
wondering
Thanks. But let's say that my LCD has four 7segment numbers on it plus some symbols along with the character display. How many characters can I drive along with the former? Most dot-matrix displays have, for example, 5 x 7 pixels characters. How much multiplexing can I use? I assume that I would need 5 + 7 lines = 13 lines, right? Or do I need 5 x 7 x n segment lines (where n is the number of characters I want to use)?
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20 years ago
some
Hi, If the number of total segments segments is 96 on the MSP430 version mentioned earlier, you have the potential for driving the 4 seven segment numbers plus 96 - (4*7) = 68 more symbols on the LCD. The MSP430 LCD drivers can drive up to 4 backplanes on an LCD so the total number of connections is 4 (backplanes) + 24(drivelines) = 28.
My experience has been that the LCD manufacturer will have restrictions on the mapping of the LCD segments vs. backplanes, since they have to route traces inside the display.
I can discuss further with you if you email directly.
John
snipped-for-privacy@JSTtech.com