Typewriter User Manual

MOTOROLA MC68340 USER’S MANUAL 5- 75
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COMMANDS TRANSMITTED TO THE CPU32
COMMAND CODE TRANSMITTED DURING THIS CYCLE
HIGH-ORDER 16 BITS OF MEMORY ADDRESS
LOW-ORDER 16 BITS OF MEMORY ADDRESS
SEQUENCE TAKEN IF
OPERATION HAS NOT
COMPLETED
DATA UNUSED FROM
THIS TRANSFER
SEQUENCE TAKEN IF
ILLEGAL COMMAND
IS RECEIVED BY CPU32
RESULTS FROM PREVIOUS COMMAND
RESPONSES FROM THE CPU
NONSERIAL-RELATED ACTIVITY
MS ADDR
"NOT READY"
XXX
"ILLEGAL"
LS ADDR
"NOT READY"
NEXT CMD
"NOT READY"
READ (LONG)
???
NEXT CMD
"NOT READY"
XXX
"NOT READY"
XXX
XXX
BERR/AERR
XXX
MS RESULT
NEXT CMD
LS RESULT
READ
MEMORY
LOCATION
NEXT
COMMAND
CODE
SEQUENCE TAKEN IF BUS ERROR
OR ADDRESS ERROR OCCURS ON
MEMORY ACCESS
HIGH- AND LOW-ORDER
16 BITS OF RESULT
Figure 5-27. Command-Sequence Diagram
5.6.2.8.3 Command Set Summary. The BDM command set is summarized in Table 5-23.
Subsequent paragraphs contain detailed descriptions of each command.
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cale Semiconductor,
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