MC68340 datasheet(212/441 Pages) FREESCALE

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MOTOROLA

MC68340 USER’S MANUAL

5- 75

. . ......... .. .. ..... .. .. .. ........

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

BERR/AERR

XXX

MS RESULT

NEXT CMD

LS RESULT

READ

MEMORY

LOCATION

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.

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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