MC68HC912BL16 Datasheet, PDF (125/128 Pages) Freescale Semiconductor, Inc – 16-Bit Microcontroller

Freescale Semiconductor, Inc.
BKDBE — Enable Data Bus
Enables comparing of address or data bus values using the BRKDH/L registers.
0 = BRKDH/L registers are not used in any comparison
1 = BRKDH/L registers are used to compare address or data (depending upon the mode selections
BKEN1,0)
BKMBH — Breakpoint Mask High
Disables the comparing of the high byte of data when in full breakpoint mode. Used in conjunction with
the BKDBE bit (which should be set)
0 = High byte of data bus (bits 15:8) are compared to BRKDH
1 = High byte is not used to in comparisons
BKMBL — Breakpoint Mask Low
Disables the matching of the low byte of data when in full breakpoint mode. Used in conjunction with
the BKDBE bit (which should be set)
0 = Low byte of data bus (bits 7:0) are compared to BRKDL
1 = Low byte is not used to in comparisons.
BK1RWE — R/W Compare Enable
Enables the comparison of the R/W signal to further specify what causes a match. This bit is NOT useful
in program breakpoints or in full breakpoint mode. This bit is used in conjunction with a second address
in dual address mode when BKDBE=1.
0 = R/W is not used in comparisons
1 = R/W is used in comparisons
BK1RW — R/W Compare Value
When BK1RWE = 1, this bit determines the type of bus cycle to match.
0 = A write cycle will be matched
1 = A read cycle will be matched
BK0RWE — R/W Compare Enable
Enables the comparison of the R/W signal to further specify what causes a match. This bit is not useful
in program breakpoints.
0 = R/W is not used in the comparisons
1 = R/W is used in comparisons
BK0RW — R/W Compare Value
When BK0RWE = 1, this bit determines the type of bus cycle to match on.
0 = Write cycle will be matched
1 = Read cycle will be matched
Table 45 Breakpoint Read/Write Control
BK1RWE
–
–
–
0
1
1
BK1RW
–
–
–
X
0
1
BK0RWE
0
1
1
–
–
–
BK0RW
X
0
1
–
–
–
Read/Write Selected
R/W is don’t care for full mode or dual mode
BKP0
R/W is write for full mode or dual mode BKP0
R/W is read for full mode or dual mode BKP0
R/W is don’t care for dual mode BKP1
R/W is write for dual mode BKP1
R/W is read for dual mode BKP1
MC68HC912BL16TS/D
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