Chapter 8 S12X Debug (S12XDBGV3) Module
MC9S12XE-Family Reference Manual , Rev. 1.19
316
Freescale Semiconductor
The trigger priorities described in
dictate that in the case of simultaneous matches, the match
on the lower channel number (0,1,2,3) has priority. The SC[3:0] encoding ensures that a match leading to
final state has priority over all other matches.
8.3.2.7.2
Debug State Control Register 2 (DBGSCR2)
Read: If COMRV[1:0] = 01
Write: If COMRV[1:0] = 01 and S12XDBG is not armed.
This register is visible at 0x0027 only with COMRV[1:0] = 01. The state control register 2 selects the
targeted next state whilst in State2. The matches refer to the match channels of the comparator match
control logic as depicted in
and described in
. Comparators must be enabled
by setting the comparator enable bit in the associated DBGXCTL control register.
0100
Match2 triggers to State3....... Other matches have no effect
0101
Match2 triggers to Final State....... Other matches have no effect
0110
Match0 triggers to State2....... Match1 triggers to State3....... Other matches have no effect
0111
Match1 triggers to State3....... Match0 triggers Final State....... Other matches have no effect
1000
Match0 triggers to State2....... Match2 triggers to State3....... Other matches have no effect
1001
Match2 triggers to State3....... Match0 triggers Final State....... Other matches have no effect
1010
Match1 triggers to State2....... Match3 triggers to State3....... Other matches have no effect
1011
Match3 triggers to State3....... Match1 triggers to Final State....... Other matches have no effect
1100
Match3 has no effect....... All other matches (M0,M1,M2) trigger to State2
1101
Reserved. (No match triggers state sequencer transition)
1110
Reserved. (No match triggers state sequencer transition)
1111
Reserved. (No match triggers state sequencer transition)
Address: 0x0027
7
6
5
4
3
2
1
0
R
0
0
0
0
SC3
SC2
SC1
SC0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 8-10. Debug State Control Register 2 (DBGSCR2)
Table 8-24. DBGSCR2 Field Descriptions
Field
Description
3–0
SC[3:0]
These bits select the targeted next state whilst in State2, based upon the match event.
Table 8-25. State2 —Sequencer Next State Selection
SC[3:0]
Description
0000
Any match triggers to state1
0001
Any match triggers to state3
Table 8-23. State1 Sequencer Next State Selection (continued)
SC[3:0]
Description
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
S12XE
products
in
208
MAPBGA
packages