Datasheet

Chapter 8 S12X Debug (S12XDBGV3) Module
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor 325
8.3.2.8.5 Debug Comparator Data High Register (DBGXDH)
Read: Anytime. See Table 8-29 for visible register encoding.
Write: If DBG not armed. See Table 8-29 for visible register encoding.
8.3.2.8.6 Debug Comparator Data Low Register (DBGXDL)
Read: Anytime. See Table 8-29 for visible register encoding.
Write: If DBG not armed. See Table 8-29 for visible register encoding.
Address: 0x002C
76543210
R
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8
W
Reset 00000000
Figure 8-18. Debug Comparator Data High Register (DBGXDH)
Table 8-35. DBGXAH Field Descriptions
Field Description
7–0
Bits[15:8]
Comparator Data High Compare Bits — The Comparator data high compare bits control whether the selected
comparator compares the data bus bits [15:8] 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: 0x002D
76543210
R
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
W
Reset 00000000
Figure 8-19. Debug Comparator Data Low Register (DBGXDL)
Table 8-36. 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