Eight-digit-microprocessor-display

Posted on Nov 17, 2012

Display interface uses the ICM7218A/B with an 8048 family microcontroller. The 8-bit data bus (DBO/ DB7-IDO/ID7) transfers control and data information to the 7218 display interface on successive WRITE pulses. The mode input pins on the microcontroller. When mode is high, a control word is transferred; when mode is low, data is transferred. Sequential locations in the 8-byte static memory are automatically loaded on each successive WRITE pulse.

Click here to download the full size of the above Circuit.

After eight WRITE pulses have occurred, further pulses are ignored until a new control word is transferred.

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