MC68340AB16E Datasheet, PDF (212/441 Pages) Motorola, Inc – Integrated Processor with DMA User’s Manual

Freescale Semiconductor, Inc.
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
NONSERIAL-RELATED ACTIVITY
READ (LONG)
???
MS ADDR
"NOT READY"
XXX
"ILLEGAL"
LS ADDR
"NOT READY"
NEXT CMD
"NOT READY"
READ
MEMORY
LOCATION
DATA UNUSED FROM
THIS TRANSFER
SEQUENCE TAKEN IF
ILLEGAL COMMAND
IS RECEIVED BY CPU32
RESULTS FROM PREVIOUS COMMAND
RESPONSES FROM THE CPU
SEQUENCE TAKEN IF
OPERATION HAS NOT
COMPLETED
XXX
"NOT READY"
NEXT
COMMAND
CODE
XXXXXX
MS RESULT
NEXT CMD
LS RESULT
XXX
BERR/AERR
NEXT CMD
"NOT READY"
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.
MOTOROLA
MC68340 USER’S MANUAL
5-75
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