Typewriter User Manual

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