MC68HC912B32MFU8 MOTOROLA [Motorola, Inc], MC68HC912B32MFU8 Datasheet - Page 125

• Manufacturer Part Number: MC68HC912B32MFU8
• Description: 16-Bit Microcontroller
• Manufacturer: MOTOROLA [Motorola, Inc]

BRKCT1 — Breakpoint Control Register 1
BKDBE — Enable Data Bus
BKMBH — Breakpoint Mask High
BKMBL — Breakpoint Mask Low
BK1RWE — R/W Compare Enable
BK1RW — R/W Compare Value
BK0RWE — R/W Compare Enable
BK0RW — R/W Compare Value
MC68HC912B32
MC68HC912B32TS/D
RESET:
This register is read/write in all modes.
Enables comparing of address or data bus values using the BRKDH/L registers.
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)
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)
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.
When BK1RWE = 1, this bit determines the type of bus cycle to match.
Enables the comparison of the R/W signal to further specify what causes a match. This bit is not useful
in program breakpoints.
When BK0RWE = 1, this bit determines the type of bus cycle to match on.
0 = The BRKDH/L registers are not used in any comparison
1 = The BRKDH/L registers are used to compare address or data (depending upon the mode se-
0 = High byte of data bus (bits 15:8) are compared to BRKDH
1 = High byte is not used to in comparisons
0 = Low byte of data bus (bits 7:0) are compared to BRKDL
1 = Low byte is not used to in comparisons.
0 = R/W is not used in comparisons
1 = R/W is used in comparisons
0 = A write cycle will be matched
1 = A read cycle will be matched
0 = R/W is not used in the comparisons
1 = R/W is used in comparisons
0 = Write cycle will be matched
1 = Read cycle will be matched
lections BKEN1,0)
Bit 7
BK1ALE
0
0
–
–
0
1
BKDBE
6
0
BK0ALE
Table 48 Breakpoint Address Range Control
0
1
–
–
BKMBH
Upper 8-bit address only for full mode or dual mode BKP0
Full 16-bit address for full mode or dual mode BKP0
Upper 8-bit address only for dual mode BKP1
Full 16-bit address for dual mode BKP1
5
0
BKMBL
4
0
Address Range Selected
BK1RWE
3
0
BK1RW
2
0
BK0RWE
1
0
BK0RW
Bit 0
0
MOTOROLA
$0021
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