Chapter 18 Version 1 ColdFire Debug (CF1_DEBUG)

 

Table 18-17. PBMR Field Descriptions

 

 

Field

Description

 

 

31–0

PC breakpoint mask.

Mask

0 The corresponding PBR0 bit is compared to the appropriate PC bit.

1The corresponding PBR0 bit is ignored.

18.3.9Address Breakpoint Registers (ABLR, ABHR)

The ABLR and ABHR define regions in the processor’s data address space that can be used as part of the trigger. These register values are compared with the address for each transfer on the processor’s high-speed local bus. The trigger definition register (TDR) identifies the trigger as one of three cases:

Identical to the value in ABLR

Inside the range bound by ABLR and ABHR inclusive

Outside that same range

The address breakpoint registers are accessible in supervisor mode using the WDEBUG instruction and through the BDM port using the WRITE_DREG command using values shown in Section 18.4.1.4, “BDM Command Set Descriptions.”

NOTE

Version 1 ColdFire core devices implement a 24-bit, 16-Mbyte address map. When programming these registers with a 32-bit address, the upper byte should be zero-filled when referencing the flash, RAM, and RGPIO regions, and set to 0xFF when referencing any of the slave peripheral devices.

DRc: 0x0C

(ABHR)

Access: Supervisor write-only

0x0D

(ABLR)

BDM write-only

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7 6 5 4

3 2 1 0

R

W

Address

ABHR

Reset

ABLR

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Reset

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 18-13. Address Breakpoint Registers (ABLR, ABHR)

 

Table 18-18. ABLR Field Description

 

 

Field

Description

 

 

31–0

Low address. Holds the 32-bit address marking the lower bound of the address breakpoint range. Breakpoints for

Address

specific addresses are programmed into ABLR.

 

 

MCF51QE128 MCU Series Reference Manual, Rev. 3

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