PC312XDP512F0CFVR datasheet(561/1348 Pages) FREESCALE

部品番号	PC312XDP512F0CFVR

部品情報	HCS12X Microcontrollers

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Chapter 14 Voltage Regulator (S12VREG3V3V5)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

561

14.3.2.4

Autonomous Periodical Interrupt Trimming Register (VREGAPITR)

The VREGAPITR register allows to trim the API timeout period.

76543210

APITR5

APITR4

APITR3

APITR2

APITR1

APITR0

Reset

1. Reset value is either 0 or preset by factory. See Device User Guide for details.

= Unimplemented or Reserved

Figure 14-5. Autonomous Periodical Interrupt Trimming Register (VREGAPITR)

Table 14-5. VREGAPITR Field Descriptions

Field

Description

7–2

APITR[5:0]

Autonomous Periodical Interrupt Period Trimming Bits — See Table 14-6 for trimming effects.

Table 14-6. Trimming Effect of APIT

Bit

Trimming Effect

APITR[5]

Increases period

APITR[4]

Decreases period less than APITR[5] increased it

APITR[3]

Decreases period less than APITR[4]

APITR[2]

Decreases period less than APITR[3]

APITR[1]

Decreases period less than APITR[2]

APITR[0]

Decreases period less than APITR[1]

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