Datasheet

Chapter 8 S12X Debug (S12XDBGV3) Module
MC9S12XE-Family Reference Manual Rev. 1.25
326 Freescale Semiconductor
8.3.2.8.7 Debug Comparator Data High Mask Register (DBGXDHM)
Read: Anytime. See Table 8-29 for visible register encoding.
Write: If DBG not armed. See Table 8-29 for visible register encoding.
8.3.2.8.8 Debug Comparator Data Low Mask Register (DBGXDLM)
Read: Anytime. See Table 8-29 for visible register encoding.
Write: If DBG not armed. See Table 8-29 for visible register encoding.
8.4 Functional Description
This section provides a complete functional description of the S12XDBG module. If the part is in secure
mode, the S12XDBG 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
Reset 00000000
Figure 8-20. Debug Comparator Data High Mask Register (DBGXDHM)
Table 8-37. DBGXDHM 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. This register
is available only for comparators A and C.
0 Do not compare corresponding data bit
1 Compare corresponding data bit
Address: 0x002F
76543210
R
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
Reset 00000000
Figure 8-21. Debug Comparator Data Low Mask Register (DBGXDLM)
Table 8-38. DBGXDLM 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. This register
is available only for comparators A and C.
0 Do not compare corresponding data bit
1 Compare corresponding data bit