mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 203

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

6.3.2
This section consists of the DBG control and trace buffer register descriptions in address order. Each
comparator has a bank of registers that are visible through an 8-byte window between 0x0028 and 0x002F
in the DBG module register address map. When ARM is set in DBGC1, the only bits in the DBG module
registers that can be written are ARM, TRIG, and COMRV[1:0]
6.3.2.1
Read: Anytime
Write: Bits 7, 1, 0 anytime
Bit 6 can be written anytime but always reads back as 0.
Bits 4:3 anytime DBG is not armed.
Freescale Semiconductor
1
2
3
4
Address: 0x0020
Address
0x002C
0x002D
0x002E
0x002F
This bit is visible at DBGCNT[7] and DBGSR[7]
This represents the contents if the Comparator A control register is blended into this address.
This represents the contents if the Comparator B control register is blended into this address
This represents the contents if the Comparator C control register is blended into this address
Reset
W
R
DBGADHM
DBGADLM
DBGADH
DBGADL
Register Descriptions
ARM
Name
Debug Control Register 1 (DBGC1)
0
7
When disarming the DBG by clearing ARM with software, the contents of
bits[4:3] are not affected by the write, since up until the write operation,
ARM = 1 preventing these bits from being written. These bits must be
cleared using a second write if required.
= Unimplemented or Reserved
W
W
W
W
R
R
R
R
TRIG
0
0
6
Bit 15
Bit 15
Bit 7
Bit 7
Bit 7
Figure 6-2. Quick Reference to DBG Registers
Figure 6-3. Debug Control Register (DBGC1)
MC9S12VR Family Reference Manual, Rev. 2.2
Preliminary - Subject to Change Without Notice
14
14
0
0
5
6
6
6
13
13
5
5
5
BDM
NOTE
0
4
12
12
4
4
4
DBGBRK
0
3
11
11
3
3
3
0
0
2
S12S Debug Module (S12SDBGV2)
10
10
2
2
2
0
1
1
9
1
9
1
COMRV
Bit 0
Bit 8
Bit 0
Bit 8
Bit 0
0
0
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