W65C816S 8- / 16-Bit Microprocessors Western Design Center W65C816S 8- / 16-bit Microprocessors are fully static CMOS devices that extend addressing to a full 16MB. Western Design Center W65C816S Microprocessors offer the advantages of CMOS technology, including increased noise immunity, higher reliability, and greatly reduced power requirements. WDC W65C816S MPUs include a software switch that determines whether the processor is in an 8-bit emulation mode or in the native mode, allowing existing systems to use the expanded features. These WDC microprocessors include full 16-bit ALU, Accumulator, Stack Pointer, and Index Registers. The W65C816S also provides low power consumption (300µA@1MHz).