mc9s12xf512 Freescale Semiconductor, Inc, mc9s12xf512 Datasheet - Page 763

• Manufacturer Part Number: mc9s12xf512
• Description: S12x Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

16.3.2.2
Freescale Semiconductor
DBGBRK
XGSBPE
COMRV
Field
BDM
3–2
1–0
5
4
XGATE S/W Breakpoint Enable — The XGSBPE bit controls whether an XGATE S/W breakpoint request is
passed to the CPU12X. The XGATE S/W breakpoint request is handled by the S12XDBG module, which can
request an CPU12X breakpoint depending on the state of this bit.
0 XGATE S/W breakpoint request is disabled
1 XGATE S/W breakpoint request is enabled
Background Debug Mode Enable — This bit determines if an S12X breakpoint causes the system to enter
Background Debug Mode (BDM) or initiate a Software Interrupt (SWI). If this bit is set but the BDM is not enabled
by the ENBDM bit in the BDM module, then breakpoints default to SWI.
0 Breakpoint to Software Interrupt if BDM inactive. Otherwise no breakpoint.
1 Breakpoint to BDM, if BDM enabled. Otherwise breakpoint to SWI
S12XDBG Breakpoint Enable Bits — The DBGBRK bits control whether the debugger will request a breakpoint
to either CPU12X or XGATE or both upon reaching the state sequencer Final State. If tracing is enabled, the
breakpoint is generated on completion of the tracing session. If tracing is not enabled, the breakpoint is
generated immediately. Please refer to
independent of the DBGBRK bits. XGATE software breakpoints force a breakpoint to the CPU12X independent
of the DBGBRK bit field configuration. See
Comparator Register Visibility Bits — These bits determine which bank of comparator register is visible in the
8-byte window of the S12XDBG module address map, located between 0x0028 to 0x002F. Furthermore these
bits determine which register is visible at the address 0x0027. See
Debug Status Register (DBGSR)
DBGBRK
COMRV
00
01
10
11
00
01
10
11
Table 16-4. DBGC1 Field Descriptions (continued)
No breakpoint generated
XGATE breakpoint generated
CPU12X breakpoint generated
Breakpoints generated for CPU12X and XGATE
MC9S12XF - Family Reference Manual, Rev.1.19
Visible Comparator
Comparator A
Comparator B
Comparator C
Comparator D
Table 16-5. DBGBRK Encoding
Table 16-6. COMRV Encoding
Section 16.4.7
Resource Halted by Breakpoint
Table
16-5.
Description
for further details. XGATE software breakpoints are
Visible Register at 0x0027
Table
DBGSCR1
DBGSCR2
DBGSCR3
Chapter 16 S12X Debug (S12XDBGV3) Module
DBGMFR
16-6.
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