S912XEG128J2MAA Datasheet, PDF (823/1324 Pages) Freescale Semiconductor, Inc – Microcontrollers

Field
1
APIE
0
APIF
Chapter 23 Voltage Regulator (S12VREGL3V3V1)
Table 23-5. VREGAPICL Field Descriptions (continued)
Description
Autonomous Periodical Interrupt Enable Bit
0 API interrupt request is disabled.
1 API interrupt will be requested whenever APIF is set.
Autonomous Periodical Interrupt Flag — APIF is set to 1 when the in the API configured time has elapsed.
This flag can only be cleared by writing a 1 to it. Clearing of the flag has precedence over setting.
Writing a 0 has no effect. If enabled (APIE = 1), APIF causes an interrupt request.
0 API timeout has not yet occurred.
1 API timeout has occurred.
23.3.2.4 Autonomous Periodical Interrupt Trimming Register (VREGAPITR)
The VREGAPITR register allows to trim the API timeout period.
0x02F3
7
6
5
4
3
2
1
0
R
0
0
APITR5
APITR4
APITR3
APITR2
APITR1
APITR0
W
Reset
0¹
0¹
0¹
0¹
0¹
0¹
0
0
1. Reset value is either 0 or preset by factory. See Section 1 (Device Overview) for details.
= Unimplemented or Reserved
Figure 23-5. Autonomous Periodical Interrupt Trimming Register (VREGAPITR)
Table 23-6. VREGAPITR Field Descriptions
Field
Description
7–2
Autonomous Periodical Interrupt Period Trimming Bits — See Table 23-7 for trimming effects.
APITR[5:0]
Table 23-7. Trimming Effect of APIT
Bit
APITR[5]
APITR[4]
APITR[3]
APITR[2]
APITR[1]
APITR[0]
Trimming Effect
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]
23.3.2.5 Autonomous Periodical Interrupt Rate High and Low Register
(VREGAPIRH / VREGAPIRL)
The VREGAPIRH and VREGAPIRL register allows the configuration of the VREG_3V3 autonomous
periodical interrupt rate.
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor
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