High-Performance SAB 80C517A/83C517A-5 8-Bit CMOS Single ...
High-Performance SAB 80C517A/83C517A-5 8-Bit CMOS Single ...
High-Performance SAB 80C517A/83C517A-5 8-Bit CMOS Single ...
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<strong>SAB</strong> <strong>80C517A</strong>/<strong>83C517A</strong>-5Multiple DatapointersAs a functional enhancement to standard 8051 controllers, the <strong>SAB</strong> <strong>80C517A</strong> contains eight16-bit datapointers. The instruction set uses just one of these datapointers at a time. Theselection of the actual datapointer is done in special function register DPSEL (data pointerselect, addr. 92 H ). Figure 3 illustrates the addressing mechanism.Figure 3Addressing of External Data MemorySemiconductor Group 25
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