Chapter 19 Pulse-Width Modulator (S12PWM8B8CV1)
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor
719
Figure 19-24. PWM 16-Bit Mode
Once concatenated mode is enabled (CONxx bits set in PWMCTL register), enabling/disabling the
corresponding 16-bit PWM channel is controlled by the low order PWMEx bit. In this case, the high order
bytes PWMEx bits have no effect and their corresponding PWM output is disabled.
In concatenated mode, writes to the 16-bit counter by using a 16-bit access or writes to either the low or
high order byte of the counter will reset the 16-bit counter. Reads of the 16-bit counter must be made by
16-bit access to maintain data coherency.
PWMCNT6
PWCNT7
PWM7
Clock Source 7
High
Low
Period/Duty Compare
PWMCNT4
PWCNT5
PWM5
Clock Source 5
High
Low
Period/Duty Compare
PWMCNT2
PWCNT3
PWM3
Clock Source 3
High
Low
Period/Duty Compare
PWMCNT0
PWCNT1
PWM1
Clock Source 1
High
Low
Period/Duty Compare
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
