NXP Semiconductors MC9S12G - Functional Description

S12S Debug Module (S12SDBGV2)
MC9S12G Family Reference Manual Rev.1.27
324 NXP Semiconductors
8.3.2.8.7 Debug Comparator Data High Mask Register (DBGADHM)
Read: If COMRV[1:0] = 00
Write: If COMRV[1:0] = 00 and DBG not armed.
8.3.2.8.8 Debug Comparator Data Low Mask Register (DBGADLM)
Read: If COMRV[1:0] = 00
Write: If COMRV[1:0] = 00 and DBG not armed.
8.4 Functional Description
This section provides a complete functional description of the DBG module. If the part is in secure mode,
the DBG module can generate breakpoints but tracing is not possible.
Address: 0x002E
76543210
R
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
Reset00000000
Figure 8-21. Debug Comparator Data High Mask Register (DBGADHM)
Table 8-30. DBGADHM Field Descriptions
Field Description
7–0
Bits[15:8]
Comparator Data High Mask Bits — The Comparator data high mask bits control whether the selected
comparator compares the data bus bits [15:8] to the corresponding comparator data compare bits. Data bus
comparisons are only performed if the TAG bit in DBGACTL is clear
0 Do not compare corresponding data bit Any value of corresponding data bit allows match.
1 Compare corresponding data bit
Address: 0x002F
76543210
R
Bit 7Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
W
Reset00000000
Figure 8-22. Debug Comparator Data Low Mask Register (DBGADLM)
Table 8-31. DBGADLM Field Descriptions
Field Description
7–0
Bits[7:0]
Comparator Data Low Mask Bits — The Comparator data low mask bits control whether the selected
comparator compares the data bus bits [7:0] to the corresponding comparator data compare bits. Data bus
comparisons are only performed if the TAG bit in DBGACTL is clear
0 Do not compare corresponding data bit. Any value of corresponding data bit allows match
1 Compare corresponding data bit