[A83] Re: lcd driver
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[A83] Re: lcd driver
At 16:06 2001-12-06, you wrote:
>Why did TI use a lcd driver in the 83(+)(SE)?
>Are there advantages about it?
>(and what about disadvantages?)
An lcd driver is always used if you have an lcd. The difference is only how
you communicate with it.
On the 83 you have to go via two dataports, on more expensive calcs, with
more advanced lcd drivers (85, 86, 89, 92) you can write to a special
memory segment that is dedicated to the lcd driver, where it automagically
reads the image data.
The difference is most probably only price. the 83 is supposed to be a
cheap calc, that most people can afford, and thus they choosed a simpler
cheaper lcd driver.
the simpler lcd driver in the 83 also allows for a more simple hardware
design, making the design cost slightly lower too.
///Olle
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