Typewriter User Manual

11/2/95 SECTION 1: OVERVIEW UM Rev 1
MOTOROLA MC68340 USER'S MANUAL xi
TABLE OF CONTENTS (Continued)
Paragraph Page
Number Title Number
5.7.1.3 Bus Controller Resources ....................................................................... 5-89
5.7.1.3.1 Prefetch Controller................................................................................ 5-90
5.7.1.3.2 Write Pending Buffer. ........................................................................... 5-90
5.7.1.3.3 Microbus Controller.............................................................................. 5-91
5.7.1.4 Instruction Execution Overlap................................................................. 5-91
5.7.1.5 Effects of Wait States................................................................................ 5-92
5.7.1.6 Instruction Execution Time Calculation................................................ 5-92
5.7.1.7 Effects of Negative Tails .......................................................................... 5-93
5.7.2 Instruction Stream Timing Examples ........................................................ 5-94
5.7.2.1 Timing Example 1—Execution Overlap................................................ 5-94
5.7.2.2 Timing Example 2—Branch Instructions .............................................. 5-95
5.7.2.3 Timing Example 3—Negative Tails....................................................... 5-96
5.7.3 Instruction Timing Tables............................................................................ 5-97
5.7.3.1 Fetch Effective Address........................................................................... 5-99
5.7.3.2 Calculate Effective Address.................................................................... 5-100
5.7.3.3 MOVE Instruction ...................................................................................... 5-101
5.7.3.4 Special-Purpose MOVE Instruction....................................................... 5-101
5.7.3.5 Arithmetic/Logic Instructions................................................................... 5-102
5.7.3.6 Immediate Arithmetic/Logic Instructions............................................... 5-105
5.7.3.7 Binary-Coded Decimal and Extended Instructions............................ 5-106
5.7.3.8 Single Operand Instructions................................................................... 5-107
5.7.3.9 Shift/Rotate Instructions........................................................................... 5-108
5.7.3.10 Bit Manipulation Instructions................................................................... 5-109
5.7.3.11 Conditional Branch Instructions............................................................. 5-110
5.7.3.12 Control Instructions................................................................................... 5-111
5.7.3.13 Exception-Related Instructions and Operations.................................. 5-111
5.7.3.14 Save and Restore Operations................................................................ 5-111
Section 6
DMA Controller Module
6.1 DMA Module Overview.................................................................................... 6-2
6.2 DMA Module Signal Definitions..................................................................... 6-4
6.2.1 DMA Request (
DREQ≈)................................................................................ 6-4
6.2.2 DMA Acknowledge (
DACK≈)...................................................................... 6-4
6.2.3 DMA Done (
DONE≈)..................................................................................... 6-4
6.3 Transfer Request Generation......................................................................... 6-4
6.3.1 Internal Request Generation....................................................................... 6-4
6.3.1.1 Internal Request, Maximum Rate........................................................... 6-5
6.3.1.2 Internal Request, Limited Rate ............................................................... 6-5
6.3.2 External Request Generation ..................................................................... 6-5
6.3.2.1 External Burst Mode................................................................................. 6-5
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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