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| 型號(hào)： | MC68HC912BL16FU8 |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | QFP-64 |
| 文件頁(yè)數(shù)： | 31/128頁(yè) |
| 文件大小： | 3326K |
| 代理商： | MC68HC912BL16FU8 |
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MC68HC912BL16
126
MC68HC912BL16TS/D
These bits are used to compare against the most significant byte of the address bus.
These bits are used to compare against the least significant byte of the address bus. These bits may
be excluded from being used in the match if BK0ALE = 0.
These bits are compared to the most significant byte of the data bus in full breakpoint mode or the most
significant byte of the address bus in dual address modes. BKEN[1:0], BKDBE, and BKMBH control
how this byte will be used in the breakpoint comparison.
These bits are compared to the least significant byte of the data bus in full breakpoint mode or the least
significant byte of the address bus in dual address modes. BKEN[1:0], BKDBE, BK1ALE, and BKMBL
control how this byte will be used in the breakpoint comparison.
NOTE
After a power-on reset, registers BRKAH, BRKAL, BRKDH, and BRKDL are
cleared but these registers are not affected by normal resets.
15.4 Instruction Tagging
The instruction queue and cycle-by-cycle CPU activity can be reconstructed in real time or from trace
history that was captured by a logic analyzer. However, the reconstructed queue cannot be used to stop
the CPU at a specific instruction, because execution has already begun by the time an operation is vis-
ible outside the MCU. A separate instruction tagging mechanism is provided for this purpose.
Executing the BDM TAGGO command configures two MCU pins for tagging. Tagging information is
latched on the falling edge of ECLK along with program information as it is fetched. Tagging is allowed
BRKAH — Breakpoint Address Register, High Byte
$0022
Bit 7
6
5
4
3
2
1
Bit 0
Bit 15
14
13
12
11
10
9
Bit 8
Power-on
RESET:
0
BRKAL — Breakpoint Address Register, Low Byte
$0023
Bit 7
6
5
4
3
2
1
Bit 0
Bit 7
6
5
4
3
2
1
Bit 0
Power-on
RESET:
0
BRKDH — Breakpoint Data Register, High Byte
$0024
Bit 7
6
5
4
3
2
1
Bit 0
Bit 15
14
13
12
11
10
9
Bit 8
Power-on
RESET:
0
BRKDL — Breakpoint Data Register, Low Byte
$0025
Bit 7
6
5
4
3
2
1
Bit 0
Bit 7
6
5
4
3
2
1
Bit 0
Power-on
RESET:
0
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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