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???
09/04/06 06:26
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#123618 - Hardware interface
Responding to: ???'s previous message
Philip, there is nothing intrinsically wrong with the hardware interface you suggested - many have done it much the same way. You can get it down to one octal register (74hc574) if you use 4 bit mode and write only. Actually you only need 6 bits - D0..3, EN, RS and r/*w is tied to 0v. Since you don't poll the ready bit, you use fixed delays.

I've also used an i2c interface for the lcds - but I find the philips 8574 chip is probably more expensive than a small micro or going to a larger micro with more i/o. Nevertheless, it forms a very simple interface.

List of 7 messages in thread
TopicAuthorDate
LCD hardware interface            01/01/70 00:00      
   2 wire LCD interface schematic, pcb, software            01/01/70 00:00      
   Look at I2C            01/01/70 00:00      
      Look at I2C            01/01/70 00:00      
         Hardware interface            01/01/70 00:00      
         Workable?            01/01/70 00:00      
            Workable?            01/01/70 00:00      

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