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8.4.4.1 BDM Status Register
STATUS — BDM Status Register
BIT 7
ENBDM
BDMACT
RESET:
0
SP.
1
S. CHIP &
PERIPH.:
ENBDM — Enable BDM ROM
Shows whether the BDM ROM is enabled. Cleared by reset.
0 = BDM ROM not enabled
1 = BDM ROM enabled, but not in memory map unless BDM is active
BDMACT — BDM Active Flag
Shows whether the BDM ROM is in the memory map. Cleared by reset.
0 = ROM not in map
1 = ROM in map (MCU is in active BDM)
ENTAG — Instruction Tagging Enable
Shows whether instruction tagging is enabled. Set by the TAGGO instruction and
cleared when BDM is entered. Cleared by reset.
Execute a TAGGO command to enable instruction tagging. Do not
write ENTAG directly.
0 = Tagging not enabled, or BDM active
1 = Tagging active
SDV — Shifter Data Valid
Shows that valid data is in the serial interface shift register.
SDV is used by firmware-based instructions. Do not attempt to write
SDV directly.
0 = No valid data
1 = Valid Data
TRACE — Trace Flag
Shows when tracing is enabled.
Execute a TRACE1 command to enable instruction tagging. Do not
attempt to write TRACE directly.
0 = Tracing not enabled
1 = Tracing active
MOTOROLA
8-12
6
5
4
ENTAG
SDV
0
0
0
0
0
0
NOTE
NOTE
NOTE
DEVELOPMENT AND DEBUG SUPPORT
3
2
1
TRACE
0
0
0
0
0
0
0
0
$FF01
BIT 0
0
0
0
CPU12
REFERENCE MANUAL
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