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I/O Port Programming

I/O Port Programming. Port 1 ? pins 1-8 ?. Port 1 is denoted by P1. P1.0 ~ P1.7 We use P1 as examples to show the operations on ports. P1 as an output port (i.e., write CPU data to the external pin) P1 as an input port (i.e., read pin data into CPU bus). Read latch. Vcc. TB2. Load(L1).

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753 views • 30 slides

Program design and analysis

Program design and analysis. Optimizing for execution time. Optimizing for energy/power. Optimizing for program size. Motivation. Embedded systems must often meet deadlines. Faster may not be fast enough. Need to be able to analyze execution time. Worst-case, not typical.

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422 views • 29 slides

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External memory accesses - PowerPoint PPT Presentation

I/O Port Programming

Program design and analysis