... others. Such simultaneous input/output of several-bit data is referred to as paralleldata input/output and the peripheral functions for paralleldata input/output are called "I/O ports", ... Chapter 8 Parallel Data Input/Output Although the programs described in Chapter 6 use the memory and CPU registers only, this chapter explains how to input and output parallel data. Among ... ports", which have registers and pins as shown in Figure 8.1. Figure 8.1: ParallelData Input/Output Parallel data input/output using I/O ports are performed through registers as shown...