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PICDEM2 Datasheet(PDF) 43 Page - Microchip Technology |
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PICDEM2 Datasheet(HTML) 43 Page - Microchip Technology |
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43 / 60 page  PICDEM 2 User’s Guide DS30374D-page 38 2001 Microchip Technology Inc. 6.2.2. ScanKbd Routine (kbd8bit.asm) This routine scans the keyboard for a keypress. When it detects one, it returns the ASCII value of the key. Figure 6.8: Keyboard Scan Set Row Counter Blank LEDs Keypress occurred Yes No on last scan? No Keypress? No Get Row Information Debounce Key Display last keypress on LEDs Determine column, row of key and get ASCII value Return Yes (DEC_TABL) |
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