Chapter 23 Voltage Regulator (S12VREGL3V3V1)
MC9S12XE-Family Reference Manual Rev. 1.19
Freescale Semiconductor
825
The period can be calculated as follows depending of APICLK:
Period = 2*(APIR[15:0] + 1) * 0.1 ms or period = 2*(APIR[15:0] + 1) * bus clock period
23.3.2.6
Reserved 06
The Reserved 06 is reserved for test purposes.
23.3.2.7
High Temperature Trimming Register (VREGHTTR)
The VREGHTTR register allows to trim the VREG temperature sense.
Fiption
1
FFFF
131072 * bus clock period
1. When trimmed within specified accuracy. See electrical specifications for details.
0x02F6
7
6
5
4
3
2
1
0
R
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
= Unimplemented or Reserved
Figure 23-8. Reserved 06
0x02F7
7
6
5
4
3
2
1
0
R
HTOEN
0
0
0
HTTR3
HTTR2
HTTR1
HTTR0
W
Reset
0
0
0
0
0
1
0
1
0
1
0
1
1. Reset value is either 0 or preset by factory. See Section 1 (Device Overview) for details.
= Unimplemented or Reserved
Figure 23-9. VREGHTTR
Table 23-10. VREGHTTR field descriptions
Field
Description
7
HTOEN
High Temperature Offset Enable Bit
— If set the temperature sense offset is enabled
0 The temperature sense offset is disabled
1 The temperature sense offset is enabled
3–0
HTTR[3:0]
High Temperature Trimming Bits
— See
for trimming effects.
Table 23-11. Trimming Effect
Bit
Trimming Effect
HTTR[3]
Increases V
HT
twice of HTTR[2]
Table 23-9. Selectable Autonomous Periodical Interrupt Periods (continued)
APICLK
APIR[15:0]
Selected Period
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