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Section 11 User Break Controller (UBC)
Rev. 4.00 Sep. 14, 2005 Page 259 of 982
REJ09B0023-0400
word data in bits 31 to 16 in BDRB and BDMRB when including the value of the data bus as a
break condition for the MOVS.W @-As,Ds, MOVS.W @As,Ds, MOVS.W @As+,Ds, or
MOVS.W @As+Ix,Ds instruction (bits 15 to 0 are ignored).
4. Access by a PREF instruction is handled as read access in longword units without access data.
Therefore, if including the value of the data bus when a PREF instruction is specified as a
break condition, a break will not occur.
5. If the L bus is selected, a break occurs on ending execution of the instruction that matches the
break condition, and immediately before the next instruction is executed. However, when data
is also specified as the break condition, the break may occur on ending execution of the
instruction following the instruction that matches the break condition. If the I bus is selected,
the instruction at which the break will occur cannot be determined. When this kind of break
occurs at a delayed branch instruction or its delay slot, the break may not actually take place
until the first instruction at the branch destination.
11.3.4
Break on X/Y-Memory Bus Cycle
1. The break condition on an X/Y-memory bus cycle is specified only in channel B. If the XYE
bit in BBRB is set to 1, the break address and break data on X/Y-memory bus are selected. At
this time, select the X-memory bus or Y-memory bus by specifying the XYS bit in BBRB. The
break condition cannot include both X-memory and Y-memory at the same time. The break
condition is applied to an X/Y-memory bus cycle by specifying L bus/data access/read or
write/word or no specified operand size in bits 7 to 0 in the break bus cycle register B (BBRB).
2. When an X-memory address is selected as the break condition, specify an X-memory address
in the upper 16 bits in BARB and BAMRB. When a Y-memory address is selected, specify a
Y-memory address in the lower 16 bits. Specification of X/Y-memory data is the same for
BDRB and BDMRB.
3. The timing of a data access break for the X memory or Y memory bus to occur is the same as a
data access break of the L bus. For details, see 5 in section 11.3.3, Break on Data Access
Cycle.
Summary of Contents for HD6417641
Page 2: ...Rev 4 00 Sep 14 2005 Page ii of l...
Page 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Page 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
Page 12: ...Rev 4 00 Sep 14 2005 Page xii of l...
Page 28: ...Rev 4 00 Sep 14 2005 Page xxviii of l...
Page 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Page 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Page 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Page 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Page 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Page 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Page 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Page 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Page 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Page 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Page 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Page 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Page 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Page 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
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