Using factory made external Font ROM IC's with PBP ?


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  1. #1
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    Feb 2013
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    Default Using factory made external Font ROM IC's with PBP ?

    Hello. There are several of special Font ROM IC's, which contain a lot of bitmap fonts. For example, GT21L16T1W contains ASCII letters in 5x7,7x8,6x12,8x16, as well as 12x12 and 16x16 pixel copies of arial font. Not to mention several thousands of greek, cyrillic, chinese and japanese fonts.
    So using such IC should be a lot of memory saver for your products and reducing load to main CPU.

    Anyone ever tried?

  2. #2
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    Default Re: Using factory made external Font ROM IC's with PBP ?

    Interesting for GLCDs. Could not find any datasheet though.

    Ioannis

  3. #3
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    Default Re: Using factory made external Font ROM IC's with PBP ?

    http://www.hobos.com.cn/upload/datasheet/GT21L16T1W.pdf

    here it is. It also has support for a lot of unicode and even Farsi letters.

  4. #4
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    Default Re: Using factory made external Font ROM IC's with PBP ?

    Thanks. Though in chinese...

    Ioannis

  5. #5
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    Default Re: Using factory made external Font ROM IC's with PBP ?

    Well, actually, that is not that hard.
    While I have no idea how to read Chinese
    I learned and remembered meaning of certain hieroglyphs, so can get general idea about what is written there.

    That datasheet contains nothing special, just says offsets for different characters and how they're mapped into rows and columns
    forget to say, it also has complete set of pseudographics, so you can draw windows, some shapes, etc, using it.

    You can use this list to see what characters are supported:

    GB 2312 - Wikipedia

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