QU80386EXTC25 Intel, QU80386EXTC25 Datasheet - Page 47

• Manufacturer Part Number: QU80386EXTC25
• Description: IC INT PROC 5V 25MHZ 132QFP
• Manufacturer: Intel

Specifications of QU80386EXTC25

• Processor Type: 386EX
• Features: 32-bit, Extended Temp
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 132-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 863826

7.0
Datasheet
Figure 20. Basic Internal and External Bus Cycles
Bus Cycle Waveforms
Figures 20 through 30 present various bus cycles that are generated by the processor. What is
shown in the figure is the relationship of the various bus signals to CLK2. These figures along with
the information present in AC Specifications allow the user to determine critical timing analysis for
a given application.
A25:1, BHE#
BLE#, D/C#
REFRESH#
CLKOUT
READY#
LOCK#
M/IO#
ADS#
D15:0
CLK2
W/R#
State
LBA#
BS8#
WR#
RD#
NA#
Cycle
Idle
Ti
Nonpipelined
[Late Ready]
T1
External
Cycle 1
(Write)
Valid 1
Valid 1
Out 1
End Cycle 1
T2
Nonpipelined
T1
Cycle 2
Internal
(Read)
Valid 2
Valid 2
End Cycle 2
T2
Intel386™ EX Embedded Microprocessor
In
2
[Early Ready]
Nonpipelined
T1
Cycle 3
Internal
(Write)
Valid 3
Out 3
End Cycle 3
T2
Valid 3
Cycle
Idle
Ti
Nonpipelined
T1
External
Cycle 4
(Read)
Valid 4
Valid 4
End Cycle 4
T2
In
4
Cycle
Idle
Ti
A2486-03
47