
Contents
iv
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
AC Timing Waveforms — RESET Setup and Hold Timing and Internal Phase .......................30
AC Timing Waveforms — Relative Signal Timing ....................................................................30
AC Timing Waveforms — SSIO Timing ...................................................................................31
AC Timing Waveforms — Timer/Counter Timing .....................................................................31
Bus Activity from Reset until First Code Fetch .........................................................................32
Local Bus Read and Write Cycles (Zero Wait States) .............................................................33
Local Bus Read and Write Cycles (With Wait States) .............................................................34
Pipelined Local Bus Read and Write Cycles (With Wait States) ..............................................35
Local Bus Read and Write BS8# Cycles ..................................................................................36
Local Bus Read and Write Cycles (Internal and External) .......................................................37
Local Bus Interrupt Acknowledge Cycle (Internal Cascade) ....................................................38
Local Bus Interrupt Acknowledge Cycle (External Cascade) ...................................................39
Local Bus Nonpipelined Refresh Cycle ....................................................................................40
Local Bus Refresh Cycle During HOLD/HLDA ........................................................................41
Intel386 EX processor and Intel387 SX Math Coprocessor System Configuration .................42
TABLES
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
168-Lead Pin Grid Array Pin Assignment ..................................................................................4
164-Pin CQFP Pin Assignment ..................................................................................................6
Pin Descriptions .........................................................................................................................7
Component and Revision Identifier Register ...........................................................................14
168-Lead PGA Package Thermal Characteristics ...................................................................15
164-Lead CQFP Package Thermal Characteristics .................................................................15
Clocks Per Instruction ..............................................................................................................16
SE1 (QML) ...............................................................................................................................17
SE2 (QML) ...............................................................................................................................17
DC Characteristics ...................................................................................................................18
AC Characteristics ...................................................................................................................20