mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 379
mc68hc912dg128
Manufacturer Part Number
mc68hc912dg128
Description
M68hc12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC912DG128.pdf
(452 pages)
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BRKCT1 — Breakpoint Control Register 1
MC68HC912DG128 — Rev 3.0
MOTOROLA
RESET:
Bit 7
0
0
BKDBE
6
0
This register is read/write in all modes.
BKDBE — Enable Data Bus
BKMBH — Breakpoint Mask High
BKMBL — Breakpoint Mask Low
BK1ALE BK0ALE
Freescale Semiconductor, Inc.
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)
–
–
0
1
For More Information On This Product,
0 = The BRKDH/L registers are not used in any comparison
1 = The BRKDH/L registers are used to compare address or data
0 = High byte of data bus (bits 15:8) are compared to BRKDH
1 = High byte is not used in comparisons
0 = Low byte of data bus (bits 7:0) are compared to BRKDL
1 = Low byte is not used in comparisons.
BKMBH
5
0
(depending upon the mode selections BKEN1,0)
Table 18-10. Breakpoint Address Range Control
Go to: www.freescale.com
0
1
–
–
Development Support
BKMBL
4
0
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
BK1RWE
3
0
Address Range Selected
BK1RW
2
0
BK0RWE
1
0
Development Support
BK0RW
Bit 0
0
Technical Data
Breakpoints
$0021
379
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