
Chapter 20 S12X Debug (S12XDBGV3) Module
MC9S12XDP512 Data Sheet, Rev. 2.17
Freescale Semiconductor
767
20.3.2.8.6
Debug Comparator Data Low Register (DBGXDL)
Read: Anytime
Write: Anytime when S12XDBG not armed.
20.3.2.8.7
Debug Comparator Data High Mask Register (DBGXDHM)
Read: Anytime
Write: Anytime when S12XDBG not armed.
Address: 0x002D
7
6
5
4
3
2
1
0
R
W
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset
0
0
0
0
0
0
0
0
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 one or logic zero. 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 zero
1 Compare corresponding data bit to a logic one
Address: 0x002E
7
6
5
4
3
2
1
0
R
W
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Reset
0
0
0
0
0
0
0
0
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