![](http://datasheet.mmic.net.cn/290000/XPC801ZP25_datasheet_16187868/XPC801ZP25_7.png)
TABLE OF CONTENTS (Continued)
Paragraph
Number
Page
Number
Title
MOTOROLA
MPC801 USER’S MANUAL
ix
7.3.7
7.3.7.1
7.3.7.2
7.3.7.3
7.3.7.4
7.3.8
7.3.9
Interrupts ....................................................................................7-8
Classes ...........................................................................7-8
Processing ......................................................................7-8
Definitions .......................................................................7-8
Partially Executed Instructions ......................................7-17
Timer Facilities .........................................................................7-17
Optional Facilities and Instructions ...........................................7-17
Section 8
Instruction Execution Timing
8.1
8.1.1
8.1.2
8.1.2.1
8.1.2.2
8.1.3
8.1.4
8.1.5
8.1.6
Instruction Execution Timing Examples ...............................................8-4
Data Cache Load .......................................................................8-4
Writeback ...................................................................................8-5
Writeback Arbitration ......................................................8-5
Private Writeback Bus Dedicated for Load .....................8-6
Fastest External Load (Data Cache Miss) ..................................8-7
A Full History Buffer ...................................................................8-8
Branch Folding ...........................................................................8-9
Branch Prediction .....................................................................8-10
Section 9
Instruction Cache
9.1
9.2
9.2.1
9.2.2
9.2.3
9.3
9.3.1
9.3.2
9.3.3
9.4
9.4.1
9.4.2
9.4.3
9.4.4
9.4.5
9.4.6
9.4.7
9.4.8
Features ...............................................................................................9-1
Programming the Instruction Cache .....................................................9-4
Instruction Cache Control and Status Register ..........................9-4
Instruction Cache Address Register ...........................................9-5
Instruction Cache Data Port Register .........................................9-6
How the Instruction Cache Works ........................................................9-6
Instruction Cache Hit ..................................................................9-6
Instruction Cache Miss ...............................................................9-6
Instruction Fetch On A Predicted Path .......................................9-7
Instruction Cache Commands ..............................................................9-7
Instruction Cache Block Invalidate .............................................9-8
Invalidate All Instruction Cache ..................................................9-8
Load & Lock ...............................................................................9-8
Unlock Line .................................................................................9-9
Unlock All ...................................................................................9-9
Instruction Cache Inhibit .............................................................9-9
Instruction Cache Read ............................................................9-10
Instruction Cache Write ............................................................9-11