Datasheet

Breakpoint (BKP) Module
Register Descriptions
MC9S12DP256 — Revision 1.1
Breakpoint (BKP) Module
BK1RW — R/W Compare Value
When BK1RWE=1, this bit determines the type of bus cycle to match
on the second address breakpoint.When BK1RWE=0, this bit has no
effect.
0 = Write cycle will be matched.
1 = Read cycle will be matched.
First Address
Memory
Expansion
Breakpoint
Register (BKP0X)
This register contains the data to be matched against expansion address
lines for the first address breakpoint when a page is selected.
Read and write: anytime.
BK0V[5:0] — First Address Breakpoint Expansion Address Value
First Address High
Byte Breakpoint
Register (BKP0H)
This register is used to set the breakpoint when compared against the
high byte of the address.
Read and write: anytime
Address $__02
Bit 7 654321Bit 0
Read: 0 0
BK0V5 BK0V4 BK0V3 BK0V2 BK0V1 BK0V0
Write:
Reset: 00000000
= Reserved or unimplemented
Address $__03
Bit 7 654321Bit 0
Read:
Bit 15 14 13 12 11 10 9 Bit 8
Write:
Reset: 00000000
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
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