11/2/95
SECTION
Semiconductor, Inc.
Freescale
1: OVERVIEW
UM Rev 1
TABLE OF CONTENTS (Continued)
Paragraph
Number
2.15
2.15.1
2.15.2
2.15.3
2.15.4
2.16
2.17
2.18
Title
Page
Number
Test Signals.......................................................................................................2-13
Test Clock (TCK)...........................................................................................2-13
Test Mode Select (TMS)..............................................................................2-13
Test Data In (TDI)..........................................................................................2-13
Test Data Out (TDO).....................................................................................2-13
Synthesizer Power (V
CCSYN
)..........................................................................2-13
System Power and Ground (V
CC
and GND)................................................2-13
Signal Summary...............................................................................................2-13
Section 3
Bus Operation
Freescale Semiconductor, Inc...
3.1
3.1.1
3.1.2
3.1.3
3.1.4
3.1.5
3.1.6
3.1.7
3.1.7.1
3.1.7.2
3.1.7.3
3.2
3.2.1
3.2.2
3.2.3
3.2.3.1
3.2.3.2
3.2.3.3
3.2.3.4
3.2.3.5
3.2.3.6
3.2.3.7
3.2.4
3.2.5
3.2.6
3.3
3.3.1
3.3.2
3.3.3
MOTOROLA
Bus Transfer Signals........................................................................................3-1
Bus Control Signals .....................................................................................3-2
Function Code Signals................................................................................3-3
Address Bus (A31–A0) ................................................................................3-4
Address Strobe (AS)....................................................................................3-4
Data Bus (D15–D0)......................................................................................3-4
Data Strobe (DS)...........................................................................................3-4
Bus Cycle Termination Signals..................................................................3-4
Data Transfer and Size Acknowledge Signals
(DSACK1 and
DSACK0).....................................................................3-4
Bus Error (BERR).......................................................................................3-5
Autovector (AVEC)....................................................................................3-5
Data Transfer Mechanism...............................................................................3-5
Dynamic Bus Sizing.....................................................................................3-5
Misaligned Operands...................................................................................3-7
Operand Transfer Cases.............................................................................3-7
Byte Operand to 8-Bit Port, Odd or Even (A0 = X) ..............................3-7
Byte Operand to 16-Bit Port, Even (A0 = 0)..........................................3-8
Byte Operand to 16-Bit Port, Odd (A0 = 1) ...........................................3-9
Word Operand to 8-Bit Port, Aligned.....................................................3-9
Word Operand to 16-Bit Port, Aligned...................................................3-10
Long-word Operand to 8-Bit Port, Aligned...........................................3-10
Long-Word Operand to 16-Bit Port, Aligned........................................3-12
Bus Operation................................................................................................3-14
Synchronous Operation with
DSACK≈.....................................................3-14
Fast Termination Cycles..............................................................................3-15
Data Transfer Cycles........................................................................................3-16
Read Cycle.....................................................................................................3-16
Write Cycle.....................................................................................................3-18
Read-Modify-Write Cycle.............................................................................3-19
MC68340 USER'S MANUAL
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