mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 479

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

16.3.2.3
Freescale Semiconductor
Reset
Reset
Field
15:0
W
W
R
R
Bit 15
Bit 7
Trace Buffer Data Bits — The trace buffer data bits contain the data of the trace buffer. This register can be read
only as a word read. Any byte reads or misaligned access of these registers will return 0 and will not cause the
trace buffer pointer to increment to the next trace buffer address. The same is true for word reads while the
debugger is armed. In addition, this register may appear to contain incorrect data if it is not read with the same
capture mode bit settings as when the trace buffer data was recorded (See
Trace
Debug Trace Buffer Register (DBGTB)
15
u
u
7
Buffer”). Because reads will reflect the contents of the trace buffer RAM, the reset state is undefined.
= Unimplemented or Reserved
= Unimplemented or Reserved
Bit 14
Figure 16-6. Debug Trace Buffer Register High (DBGTBH)
Bit 6
Figure 16-7. Debug Trace Buffer Register Low (DBGTBL)
14
u
u
6
Table 16-7. DBGTB Field Descriptions
Bit 13
Bit 5
MC9S12E256 Data Sheet, Rev. 1.08
13
u
u
5
Bit 12
Bit 4
12
u
u
4
Description
Bit 11
Bit 3
11
u
3
u
Bit 10
Bit 2
Section 16.4.2.9, “Reading Data from
10
u
u
2
Chapter 16 Debug Module (DBGV1)
Bit 9
Bit 1
u
u
9
1
Bit 8
Bit 0
u
u
8
0
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