AM186EM-20KC/W AMD [Advanced Micro Devices], AM186EM-20KC/W Datasheet - Page 60

• Manufacturer Part Number: AM186EM-20KC/W
• Description: High Performance, 80C186-/80C188-Compatible and 80L186-/80L188-Compatible, 16-Bit Embedded Microcontrollers
• Manufacturer: AMD [Advanced Micro Devices]

COMMERCIAL SWITCHING CHARACTERISTICS AND WAVEFORMS
In the switching waveforms that follow, several abbre-
viations 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
Key to Switching Waveforms
60
1
, t
2
, t
3
, and t
4
. Wait states, which represent
Am186/188EM and Am186/188EMLV Microcontrollers
WAVEFORM
P R E L I M I N A R Y
INPUT
Must be
Steady
May
Change
from H to L
May
Change
from L to H
Don’t Care,
Any Change
Permitted
Does Not
Apply
Invalid
multiple t
cycle is pending, an idle (t
In the switching parameter descriptions, the multi-
plexed address is referred to as the AD address bus; the
demultiplexed address is referred to as the A address
bus.
3
Invalid
OUTPUT
Will be
Steady
Will be
Changing
from H to L
Will be
Changing
from L to H
Changing,
State
Unknown
Center
Line is High-
Impedance
Off State
states, are referred to as t
i
) state occurs.
w
states. When no bus