Datasheet

Chapter 20 S12X Debug (S12XDBGV3) Module
MC9S12XDP512 Data Sheet, Rev. 2.21
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
76543210
R
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 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 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
76543210
R
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 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