Computers as Components, 2nd Edition

134 CHAPTER 3 CPUs

The sleep mode saves over three orders of magnitude of power consumption. However,

the time required to reenter run mode from sleep is over a tenth of a second.

The SA-1100 has a companion chip, the SA-1111, that provides an integrated set of

peripherals. That chip has its own power management modes that complement the SA-1100.

Design Example 3.7 DATA COMPRESSOR

Our design example for this chapter is a data compressor that takes in data with a

constant number of bits per data element and puts out a compressed data stream

in which the data is encoded in variable-length symbols. Because this chapter

concentrates on CPUs, we focus on ...