Chapter 14 Enhanced Capture Timer (ECT16B8CV3)
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor
557
14.3.2.28 16-Bit Pulse Accumulator B Control Register (PBCTL)
Read: Anytime
Write: Anytime
All bits reset to zero.
14.3.2.29 Pulse Accumulator B Flag Register (PBFLG)
Read: Anytime
Write used in the flag clearing mechanism. Writing a one to the flag clears the flag. Writing a zero will not
affect the current status of the bit.
Module Base + 0x0030
7
6
5
4
3
2
1
0
R
0
PBEN
0
0
0
0
PBOVI
0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 14-50. 16-Bit Pulse Accumulator B Control Register (PBCTL)
Table 14-36. PBCTL Field Descriptions
Field
Description
6
PBEN
Pulse Accumulator B System Enable
— PBEN is independent from TEN. With timer disabled, the pulse
accumulator can still function unless pulse accumulator is disabled.
0 16-bit pulse accumulator system disabled. 8-bit PAC1 and PAC0 can be enabled when their related enable
bits in ICPAR are set.
1 Pulse accumulator B system enabled. The two 8-bit pulse accumulators PAC1 and PAC0 are cascaded to form
the PACB 16-bit pulse accumulator B. When PACB is enabled, the PACN1 and PACN0 registers contents are
respectively the high and low byte of the PACB.
PA1EN and PA0EN control bits in ICPAR have no effect.
The PACB shares the input pin with IC0.
1
PBOVI
Pulse Accumulator B Overflow Interrupt Enable
0 Interrupt inhibited
1 Interrupt requested if PBOVF is set
Module Base + 0x0031
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
PBOVF
0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 14-51. Pulse Accumulator B Flag Register (PBFLG)
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