mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 498
mc9s12xs128
Manufacturer Part Number
mc9s12xs128
Description
Hcs12 Microcontrollers 16-bit Automotive Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12XS128.pdf
(738 pages)
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Voltage Regulator (S12VREGL3V3V1)
17.3.2.4
The VREGAPITR register allows to trim the API timeout period.
498
0x02F3
APITR[5:0]
1. Reset value is either 0 or preset by factory. See Section 1 (Device Overview) for details.
Reset
Field
7–2
W
R
APITR5
Autonomous Periodical Interrupt Period Trimming Bits — See
Autonomous Periodical Interrupt Trimming Register (VREGAPITR)
0
Figure 17-4. Autonomous Periodical Interrupt Trimming Register (VREGAPITR)
7
1
= Unimplemented or Reserved
APITR4
APITR[5]
APITR[4]
APITR[3]
APITR[2]
APITR[1]
APITR[0]
0
6
1
Bit
Table 17-7. VREGAPITR Field Descriptions
S12XS Family Reference Manual, Rev. 1.10
Table 17-8. Trimming Effect of APIT
Increases period
Decreases period less than APITR[5] increased it
Decreases period less than APITR[4]
Decreases period less than APITR[3]
Decreases period less than APITR[2]
Decreases period less than APITR[1]
APITR3
0
5
1
APITR2
0
4
1
Trimming Effect
Description
APITR1
0
3
1
Table 17-8
APITR0
0
2
1
for trimming effects.
Freescale Semiconductor
0
0
1
0
0
0
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