mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 452

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 15 Background Debug Module (BDMV4)
15.3.2.2
Read: All modes
Write: All modes
When entering background debug mode, the BDM CCR holding register is used to save the contents of
the condition code register of the user’s program. It is also used for temporary storage in the standard BDM
firmware mode. The BDM CCR holding register can be written to modify the CCR value.
15.3.2.3
Read: All modes
Write: Never
452
REG[14:11]
Reset
Reset
Field
6:3
W
W
R
R
CCR7
Internal Register Map Position — These four bits show the state of the upper five bits of the base address for
the system’s relocatable register block. BDMINR is a shadow of the INITRG register which maps the register
block to any 2K byte space within the first 32K bytes of the 64K byte address space.
BDM CCR Holding Register (BDMCCR)
BDM Internal Register Position Register (BDMINR)
0
0
0
7
7
When BDM is made active, the CPU stores the value of the CCR register in
the BDMCCR register. However, out of special single-chip reset, the
BDMCCR is set to 0xD8 and not 0xD0 which is the reset value of the CCR
register.
= Unimplemented or Reserved
REG14
CCR6
0
0
Figure 15-5. BDM Internal Register Position (BDMINR)
6
6
Figure 15-4. BDM CCR Holding Register (BDMCCR)
Table 15-4. BDMINR Field Descriptions
REG13
CCR5
MC9S12E256 Data Sheet, Rev. 1.08
0
0
5
5
REG12
CCR4
NOTE
0
0
4
4
Description
REG11
CCR3
3
0
3
0
CCR2
0
0
0
2
2
Freescale Semiconductor
CCR1
0
0
0
1
1
CCR0
0
0
0
0
0