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Intel 80386 - Page 8

Intel 80386
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TABLE OF CONTENTS
CHAPTER 1
Page
SYSTEM OVERVIEW
1.1
Microprocessor .............................................................................................
1-1
1 .2 Coprocessors.
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. . . 1-3
1.3
Interrupt Controller ........................................................................................ 1-4
1.4
Clock Generator ............................................................................................ 1-4
1.5 DMA
Controller .................................. ....
...
....
...
...... ..... .................................. 1-4
CHAPTER 2
INTERNAL ARCHITECTURE
2.1
Bus
Interface
Unit
................................. .....
...
.... ..... ................. ............. .......... 2-2
2.2 Code Prefetch
Unit
........................................................................................ 2-3
2.3
Instruction
Decode
Unit
................................................................................. 2-3
2.4 Execution
Unit
............................................................................................... 2-3
2.5 Segmentation
Unit
......................................................................................... 2-4
2.6
Paging
Unit
.................................................................................................... 2-4
CHAPTER 3
LOCAL
BUS
INTERFACE
3.1
Bus
Operations ....................... .............
...
....... ........... ..............
... ...
..... ........... 3-2
3.1.1
Bus
States ........................... ............. ......... ............ ........ .........
... ...
............. 3-4
3.1.2 Address
Pipelining
.............. ...........
... ...
....... .... ........ ........ ...... ..... .... ............. 3-5
3.1.3 32-Bit Data
Bus
Transfers
and
Operand
Alignment
................
... ...
....... ...... 3-5
3.1.4 Read
Cycle
...
................ ..................... ....... ............... ................
...
..... ........... 3-10
3.1.5 Write Cycle ....
...
...... ....... ........ ..... ..... ....
...
.......
...
........ ..... .................. ........... 3-13
3.1.6
Pipelined
Address Cycle ............................................................................. 3-14
3.1.7
Interrupt Acknowledge Cycle ..................................................................... 3-17
3.1.8
Halt/Shutdown Cycle ....... ...... ....... ......
...
....
...
...... ......
...
................... ........... 3-18
3.1.9
BS16 Cycle ................................................................................................ 3-19
3.1.10 16-Bit Byte Enables
and
Operand
Alignment
........................... ..... ..... ...... 3-20
3.2
Bus
Timing
...... .... ................................
...
....
...
.... ........ .......... ......
...
.......... ....... 3-22
3.2.1 Read Cycle
Timing
..................................................................................... 3-24
3.2.2 Write
Cycle
Timing
...
...
.............. ........
...
....
...
...... ...... .......... ........ ..... ............ 3-24
3.2.3
READY#
Signal
Timing
.............................................................................. 3-25
3.3
Clock Generation . ..... ........................... .... ...... ....
...
.....
...
............. .......... .......
...
3-26
3.3.1 82384
Clock Generator ............. .....
... ...
....
...
...... ...... .......... ........ ................. 3-26
3.3.2
Clock
Timing
.............................................................................................. 3-26
3.4
Interrupts .......................... ...... .......
...
.....
...
....... ...... ........ ................ ..... ........... 3-27
3.4.1
Non-Maskable Interrupt (NMI) .................................................................... 3-29
3.4.2
Maskable Interrupt (INTR) ......... ....... ....
... ...
.... .....
...
................ ..... ............
...
3-29
3.4.3
Interrupt Latency....... .... .... .........
...
.....
...
....... ...... ........ ................ .... ............ 3-30
3.5
Bus
Lock
................................ ..... ..... .....
...
.......
... ...
........ ................ .... ............ 3-30
3.5.1 Locked Cycle Activators ...... .............. ...... .......
...
......... .......... ........ ......... ..... 3-31
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