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>-5Functional DescriptionThe <strong>SAB</strong> <strong>80C517A</strong> is based on 8051 architecture. It is a fully compatible member of theSiemens <strong>SAB</strong> 8051/80C51 microcontroller family being an significantly enhanced<strong>SAB</strong> 80C517. The <strong>SAB</strong> <strong>80C517A</strong> is therefore compatible with code written for the<strong>SAB</strong> 80C517.Having an 8-bit CPU with extensive facilities for bit-handling and binary BCD arithmetics the<strong>SAB</strong> <strong>80C517A</strong> is optimized for control applications. With a 18 MHz crystal, 58 % of theinstructions are executed in 666.67 ns.Being designed to close the performance gap to the 16-bit microcontroller world, the<strong>SAB</strong> <strong>80C517A</strong>’s CPU is supported by a powerful 32-/16-bit arithmetic unit and a more flexibleaddressing of external memory by eight 16-bit datapointers.Memory OrganisationAccording to the <strong>SAB</strong> 8051 architecture, the <strong>SAB</strong> <strong>80C517A</strong> has separate address spaces forprogram and data memory. Figure 2 illustrates the mapping of address spaces.Figure 2Memory MapSemiconductor Group 17
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