For The Latest Information - Motorola DSP56800 Manual

Introduction
• Instruction set—The instruction mnemonics are MCU-like, making the transition from
programming microprocessors to programming the chip as easy as possible. New microcontroller
instructions, addressing modes, and bit-field instructions allow for significant decreases in program
code size. The orthogonal syntax controls the parallel execution units. The hardware DO loop
instruction and the repeat (REP) instruction make writing straight-line code obsolete.
• Low power—Designed in CMOS, the DSP56800 Family inherently consumes very low power.
Two additional low power modes, stop and wait, further reduce power requirements. Wait is a
low-power mode where the DSP56800 core is shut down but the peripherals and interrupt controller
continue to operate so that an interrupt can bring the chip out of wait mode. In stop mode, even more
of the circuitry is shut down for the lowest power-consumption mode. There are also several
different ways to bring the chip out of stop mode.
1.4

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