Chapter 13
ZT 88CT08A/88CT09A CMOS BOARDS
Contents
Page
OVERVIEW
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13-1
FUNCTIONAL DIFFERENCES
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13-2
Logic Family (CT vs. C)
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13-2
Use of 80C88 Processor
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13-3
Addition of Optional 8087(-2)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13-4
Clock Slowdown Mode
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13-4
Halt With Restart Via Interrupt
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13-6
ELECTRICAL/ENVIRONMENTAL DIFFERENCES
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13-8
Increased Temperature Range
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13-8
Reduced Power Consumption
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13-8
Bus Loading
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13-9
OVERVIEW
The ZT 8808A and ZT 8809A processor boards are also available in
CMOS versions, the ZT 88CT08A and ZT 88CT09A, respectively.
The CMOS versions provide lower power and extended temperature
operation. Like the ZT 8808A and ZT 8809A, the ZT 88CT08A and
ZT 88CT09A differ only in their processor clock speeds, which are 5
and 8 MHz, respectively.
This chapter describes the functional,
electrical, and environmental differences between the CMOS versions
and the non-CMOS versions. References in this chapter to the
ZT 88CT09A also apply to the ZT 88CT08A unless otherwise noted.
13-1
