AM186ES Advanced Micro Devices, AM186ES Datasheet - Page 49

• Manufacturer Part Number: AM186ES
• Description: microcontrollers provide a low-cost/ high-performance solution for embedded system designers who wish to use the x86 architecture.
• Manufacturer: Advanced Micro Devices

COMMERCIAL AND INDUSTRIAL SWITCHING CHARACTERISTICS AND WAVEFORMS
In the switching waveforms that follow, several
abbreviations are used to indicate the specific periods
of a bus cycle. These periods are referred to as time
states. A typical bus cycle is composed of four
consecutive time states: t
which represent multiple t
states. When no bus cycle is pending, an idle (t
occurs.
3
1
, t
states, are referred to as t
Am186™CC Communications Controller Data Sheet
2
, t
3
, and t
WAVEFORM
Figure 16. Key to Switching Waveforms
4
. Wait states,
i
) state
Must be
Steady
May change
from H to L or
from H to three-
state
May change
from L to H or
from L to three-
state
INPUT
w
I n th e sw i t c h i ng pa r a me t e r d e s c r i p ti o n s, t h e
multiplexed address is referred to as the AD address
bus; the demultiplexed address is referred to as the A
address bus. Figure 16 defines symbols used in the
switching waveform diagrams.
Table 9 on page 50 contains an alphabetical listing of
the switching parameter symbols, and Table 10 on
page 54 contains a numerical listing of the switching
parameter symbols.
Will be
Steady
Will be
changing from H
to L or from H
to three-state
Will be changing
from L to H or
from L to three-
state
OUTPUT
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