Chapter 11 S12XE Clocks and Reset Generator (S12XECRGV1)
MC9S12XE-Family Reference Manual , Rev. 1.19
Freescale Semiconductor
473
Read: Anytime
Write: Anytime except if PLLSEL = 1
NOTE
If POSTDIV = $00 then f
PLL
is identical to f
VCO
(divide by one).
11.3.2.4
S12XECRG Flags Register (CRGFLG)
This register provides S12XECRG status bits and flags.
Read: Anytime
Write: Refer to each bit for individual write conditions
Module Base + 0x0002
7
6
5
4
3
2
1
0
R
0
0
0
POSTDIV[4:0]
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 11-5. S12XECRG Post Divider Register (POSTDIV)
Module Base + 0x0003
7
6
5
4
3
2
1
0
R
RTIF
PORF
LVRF
LOCKIF
LOCK
ILAF
SCMIF
SCM
W
Reset
0
Note 1
Note 2
Note 3
0
0
0
0
1. PORF is set to 1 when a power on reset occurs. Unaffected by system reset.
2. LVRF is set to 1 when a low voltage reset occurs. Unaffected by system reset.
3. ILAF is set to 1 when an illegal address reset occurs. Unaffected by system reset. Cleared by power on or low voltage reset.
= Unimplemented or Reserved
Figure 11-6. S12XECRG Flags Register (CRGFLG)
fPLL
fVCO
2xPOSTDIV
(
)
--------------------------------------
=
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