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FIGURE 9-1 General Parallel I/O Example
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FIGURE 9-2 Seven-Segment Display
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FIGURE 9-3 Seven-Segment LED Display Connections
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FIGURE 9-4 Seven-Segment Code Examples
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FIGURE 9-5 Parallel Output to Seven-Segment Displays
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FIGURE 9-6 Liquid-Crystal Display
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FIGURE 9-7 Example of a 5 x 8 Dot Matrix LCD Display Controlled by an MC145000 LCD Driver
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FIGURE 9-8 Sample LCD Excitation Waveforms Based on MC145000 Driver IC
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FIGURE 9-9 3 x 4 Matrix Keyboard (Telephone Format)
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FIGURE 9-10 Parallel I/O with Keyboard. Also connect PC7 high using a pull-up resistor.
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FIGURE 9-11 2-out-of-7 Keyboard Decoding Using Port C
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FIGURE 9-12 Using Hardware Decoders with Keyboard
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FIGURE 9-13 Strobed I/O
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FIGURE 9-14 Parallel I/O Control Register
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FIGURE 9-15 Input Handshaking
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FIGURE 9-16 Input Handshake Timing Diagrams
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FIGURE 9-17 Output Handshaking
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FIGURE 9-18 Output Handshake Timing Diagrams
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FIGURE 9-19 Centronics Parallel Interface Timing Diagram
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FIGURE 9-20 Centronics Parallel Interface Pin Assignments
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FIGURE 9-21 IEEE-488 Handshaking Timing Diagram
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FIGURE 9-22 Open-Drain Outputs for Wired-AND Application
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FIGURE 9-23 Command and Data Phases of a SCSI Bus
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