Chapter 14 Enhanced Capture Timer (ECT16B8CV3)
MC9S12XE-Family Reference Manual , Rev. 1.19
558
Freescale Semiconductor
NOTE
When TFFCA = 1, the flag cannot be cleared via the normal flag clearing
mechanism (writing a one to the flag). Reference
System Control Register 1 (TSCR1)”
.
All bits reset to zero.
PBFLG indicates when interrupt conditions have occurred. The flag can be cleared via the normal flag
clearing mechanism (writing a one to the flag) or via the fast flag clearing mechanism (Reference TFFCA
bit in
Section 14.3.2.6, “Timer System Control Register 1 (TSCR1)”
).
14.3.2.30 8-Bit Pulse Accumulators Holding Registers (PA3H–PA0H)
Table 14-37. PBFLG Field Descriptions
Field
Description
1
PBOVF
Pulse Accumulator B Overflow Flag
— This bit is set when the 16-bit pulse accumulator B overflows from
0xFFFF to 0x0000, or when 8-bit pulse accumulator 1 (PAC1) overflows from 0x00FF to 0x0000.
When PACMX = 1, PBOVF bit can also be set if 8-bit pulse accumulator 1 (PAC1) reaches 0x00FF and an active
edge follows on PT1.
Module Base + 0x0032
7
6
5
4
3
2
1
0
R
PA3H7
PA3H6
PA3H5
PA3H4
PA3H3
PA3H2
PA3H1
PA3H0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 14-52. 8-Bit Pulse Accumulators Holding Register 3 (PA3H)
Module Base + 0x0033
7
6
5
4
3
2
1
0
R
PA2H7
PA2H6
PA2H5
PA2H4
PA2H3
PA2H2
PA2H1
PA2H0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 14-53. 8-Bit Pulse Accumulators Holding Register 2 (PA2H)
Module Base + 0x0034
7
6
5
4
3
2
1
0
R
PA1H7
PA1H6
PA1H5
PA1H4
PA1H3
PA1H2
PA1H1
PA1H0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 14-54. 8-Bit Pulse Accumulators Holding Register 1 (PA1H)
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