- Category:
- assembly language
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- File Size:
- 19kb
- Update:
- 2016-11-14
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Description: Simple calculator needs 8 bit 2 segment code LED display circuit. With 8031 MCU by 8255A to extend the 8 bit 2 segment code LED display, with the A 8255A port as the segment code (font code) data port, PB0 and PB1 as a bit control port. In the position control port and an open collector of the reverse voltage driver 74LS06 to provide sufficient current to drive the LED display, and then connect to the common cathode of the digital display. Similarly, normal phase high voltage driver 74LS07 open circuit in the code segment data collector provide enough current, then each received digital display
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