PC912XDP512F0MPVR datasheet(765/1348 Pages) FREESCALE

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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

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

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

Bit 15

Bit 14

Bit 13

Bit 12

Bit 11

Bit 10

Bit 9

Bit 8

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

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