mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 153

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
5.5.3.3.9 Read Control Register (
Read the selected control register and return the 32-bit result. Accesses to the
processor/memory control registers are always 32 bits wide, regardless of register width.
The second and third words of the command form a 32-bit address, which the debug
module uses to generate a special bus cycle to access the specified control register. The
12-bit Rc field is the same as that used by the MOVEC instruction.
Command/Result Formats:
Rc encoding:
Command Sequence:
Operand Data:
Result Data:
Command
Result
0x002
0x004
0x005
0x801
0x804
0x805
Rc
RCREG
???
Cache control register (CACR)
Access control register 0 (ACR0)
Access control register 1 (ACR1)
Vector base register (VBR)
MAC status register (MACSR)
MAC mask register (MASK)
15
Register Definition
0x2
0x0
0x0
"NOT READY"
Figure 5-33.
EXT WORD
MS ADDR
The only operand is the 32-bit Rc control register select field.
Control register contents are returned as a longword,
most-significant word first. The implemented portion of registers
smaller than 32 bits is guaranteed correct; other bits are undefined.
Figure 5-34.
12
Table 5-19. Control Register Map
11
Chapter 5. Debug Support
"NOT READY"
RCREG
EXT WORD
MS ADDR
RCREG
0x9
0x0
RCREG
Command/Result Formats
Command Sequence
D[31:16]
0xC04
0xC0F
0x806
0x80E
0x80F
REGISTER
CONTROL
8
D[15:0]
LOCATION
MEMORY
Rc
)
READ
7
MAC accumulator (ACC)
Status register (SR)
Program register (PC)
RAM base address register (RAMBAR)
Module base address (MBAR)
0x8
0x0
Rc
Background Debug Mode (BDM)
Register Definition
"NOT READY"
MS RESULT
4
BERR
XXX
XXX
XXX
XXX
3
0x0
0x0
"NOT READY"
LS RESULT
NEXT CMD
NEXT CMD
0
5-31