mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 378
mc68hc912dg128
Manufacturer Part Number
mc68hc912dg128
Description
M68hc12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC912DG128.pdf
(452 pages)
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Development Support
BRKCT0 — Breakpoint Control Register 0
Technical Data
378
RESET:
BKEN1 BKEN0
0
0
1
1
BKEN1
Bit 7
0
1
0
1
0
Breakpoints Off
SWI — Dual Address Mode
BDM — Full Breakpoint Mode
BDM — Dual Address Mode
BKEN0
6
0
Read and write anytime.
This register is used to control the breakpoint logic.
BKEN1, BKEN0 — Breakpoint Mode Enable
BKPM — Break on Program Addresses
BK1ALE — Breakpoint 1 Range Control
BK0ALE — Breakpoint 0 Range Control
Mode Selected
Freescale Semiconductor, Inc.
This bit controls whether the breakpoint will cause a break on a match
(next instruction boundary) or on a match that will be an executable
opcode. Data and non-executed opcodes cannot cause a break if this
bit is set. This bit has no meaning in SWI dual address mode. The
SWI mode only performs program breakpoints.
Only valid in dual address mode.
Valid in all modes.
Table 18-9. Breakpoint Mode Control
For More Information On This Product,
0 = On match, break at the next instruction boundary
1 = On match, break if the match is an instruction that will be
0 = BRKDL will not be used to compare to the address bus.
1 = BRKDL will be used to compare to the address bus.
0 = BRKAL will not be used to compare to the address bus.
1 = BRKAL will be used to compare to the address bus.
BKPM
5
0
executed. This uses tagging as its breakpoint mechanism.
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Development Support
4
0
0
BRKAH/L Usage BRKDH/L Usage
Address Match
Address Match
Address Match
BK1ALE
3
0
—
BK0ALE
2
0
Address Match
Address Match
Data Match
—
MC68HC912DG128 — Rev 3.0
1
0
0
R/W
Bit 0
Yes
Yes
No
—
0
0
MOTOROLA
Range
Yes
Yes
Yes
—
$0020
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