11/2/95
SECTION 1: OVERVIEW
UM Rev 1
Freescale Semiconductor, Inc.
TABLE OF CONTENTS (Continued)
Paragraph
Number
Page
Number
Title
2.15
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
2.15.1
2.15.2
2.15.3
2.15.4
2.16
Synthesizer Power (V )..........................................................................2-13
CCSYN
2.17
System Power and Ground (V and GND)................................................2-13
CC
2.18
Signal Summary...............................................................................................2-13
Section 3
Bus Operation
3.1
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
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
(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
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
MC68340 USER'S MANUAL
v
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