Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 用户手册
产品代码
DEMO9S12XHY256
Background Debug Module (S12XBDMV2)
MC9S12XHY-Family Reference Manual Rev. 1.04
Freescale Semiconductor
203
5.3.2.1
BDM Status Register (BDMSTS)
Figure 5-3. BDM Status Register
(
BDMSTS)
0x7FFF07
BDMCCRH R
0
0
0
0
0
CCR10
CCR9
CCR8
W
0x7FFF08
BDMGPR
R
BGAE
BGP6
BGP5
BGP4
BGP3
BGP2
BGP1
BGP0
W
0x7FFF09
Reserved
R
0
0
0
0
0
0
0
0
W
0x7FFF0A
Reserved
R
0
0
0
0
0
0
0
0
W
0x7FFF0B
Reserved
R
0
0
0
0
0
0
0
0
W
Register Global Address 0x7FFF01
7
6
5
4
3
2
1
0
R
ENBDM
BDMACT
0
SDV
TRACE
CLKSW
UNSEC
0
W
Reset
Special Single-Chip Mode
0
1
1
ENBDM is read as 1 by a debugging environment in special single chip mode when the device is not secured or secured but
fully erased (non-volatile memory). This is because the ENBDM bit is set by the standard firmware before a BDM command
can be fully transmitted and executed.
fully erased (non-volatile memory). This is because the ENBDM bit is set by the standard firmware before a BDM command
can be fully transmitted and executed.
1
0
0
0
0
0
3
3
UNSEC is read as 1 by a debugging environment in special single chip mode when the device is secured and fully erased,
else it is 0 and can only be read if not secure (see also bit description).
else it is 0 and can only be read if not secure (see also bit description).
0
Emulation Modes
(if modes available)
1
0
0
0
0
1
2
2
CLKSW is read as 1 by a debugging environment in emulation modes when the device is not secured and read as 0 when
secured if emulation modes available.
secured if emulation modes available.
0
0
All Other Modes
0
0
0
0
0
0
0
0
= Unimplemented, Reserved
= Implemented (do not alter)
0
= Always read zero
Global
Address
Register
Name
Bit 7
6
5
4
3
2
1
Bit 0
= Unimplemented, Reserved
= Implemented (do not alter)
X
= Indeterminate
0
= Always read zero
Figure 5-2. BDM Register Summary (continued)