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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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PC912XDP512F0MPVR 데이터시트(PDF) 707 Page - Freescale Semiconductor, Inc |
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PC912XDP512F0MPVR 데이터시트(HTML) 707 Page - Freescale Semiconductor, Inc |
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707 / 1348 page  Chapter 19 S12X Debug (S12XDBGV2) Module MC9S12XDP512 Data Sheet, Rev. 2.21 Freescale Semiconductor 709 19.3.1.11.1 Debug Comparator Control Register (DBGXCTL) The contents of this register bits 7 and 6 differ depending upon which comparator registers are visible in the 8-byte window of the DBG module register address map Read: Anytime Write: Anytime when DBG not armed. 0x0029 ADDRESS HIGH Read/Write 0x002A ADDRESS MEDIUM Read/Write 0x002B ADDRESS LOW Read/Write 0x002C DATA HIGH COMPARATOR Read/Write Comparator A and C only 0x002D DATA LOW COMPARATOR Read/Write Comparator A and C only 0x002E DATA HIGH MASK Read/Write Comparator A and C only 0x002F DATA LOW MASK Read/Write Comparator A and C only 0x0028 76543210 R0 NDB TAG BRK RW RWE SRC COMPE W Reset 00000000 Unimplemented or Reserved Figure 19-13. Debug Comparator Control Register (Comparators A and C) 0x0028 76543210 R SZE SZ TAG BRK RW RWE SRC COMPE W Reset 00000000 Figure 19-14. Debug Comparator Control Register (Comparators B and D) Table 19-27. DBGXCTL Field Descriptions Field Description 7 (COMPB/D) SZE Size Comparator Enable Bit — The SZE bit controls whether access size comparison is enabled for the associated comparator. This bit is ignored if the TAG bit in the same register is set. 0 Word/Byte access size is not used in comparison 1 Word/Byte access size is used in comparison 6 (COMPA/C) NDB Not Data Bus Compare — The NDB bit controls whether the match occurs when the data bus matches the comparator register value or when the data bus differs from the register value. Furthermore database bits can be individually masked using the comparator data mask registers. This bit is only available for comparators A and C. This bit is ignored if the TAG bit in the same register is set. This bit position has an SZ functionality for comparators B and D. 0 Match on data bus equivalence to comparator register contents 1 Match on data bus difference to comparator register contents Table 19-26. Comparator Register Layout |
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