Chapter 20 Debug (S12XDBGV2)
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 811
20.3.1.11.6 Debug Comparator Data Low Register (DBGXDL)
Read: Anytime
Write: Anytime when DBG not armed.
20.3.1.11.7 Debug Comparator Data High Mask Register (DBGXDHM)
Read: Anytime
Write: Anytime when DBG not armed.
0x002D
76543210
RBit 7 6 5 4 3 2 1 Bit 0
W
Reset 00000000

Figure 20-19. Debug Comparator Data Low Register (DBGXDL)

Table 20-33. DBGXDL Field Descriptions

Field Description
7–0
Bits [7:0]
Comparator Data Low Compare Bits — The comparator data low compare bits control whether the selected
comparator compares the data bus bits [7:0] to a logic 1 or logic 0. The comparator data compare bits are only
used in comparison if the corresponding data mask bit is logic 1. This register is available only for comparators
A and C.
0 Compare corresponding data bit to a logic 0
1 Compare corresponding data bit to a logic 1
0x002E
76543210
RBit 15 14 13 12 11 10 9 Bit 8
W
Reset 00000000

Figure 20-20. Debug Comparator Data High Mask Register (DBGXDHM)

Table 20-34. 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