PORTGPA datasheet(82/222 Pages) MICROCHIP

Part #	PORTGPA

Description	Digitally Enhanced Power Analog Controller with Integrated Synchronous Driver

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Manufacturer	MICROCHIP [Microchip Technology]

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MCP19111

DS22331A-page 82

 2013 Microchip Technology Inc.

13.3.1

OSCILLATOR DELAY UPON

POWER-UP, WAKE-UP AND

BASE FREQUENCY CHANGE

In applications where the OSCTUNE register is used to

shift the frequency of the internal oscillator, the

application should not expect the frequency of the

internal oscillator to stabilize immediately. In this case,

the frequency may shift gradually toward the new

value. The time for this frequency shift is less than eight

cycles of the base frequency.

On power up, the device is held in reset by the

power-up time, if the power-up timer is enabled.

Following a wake-up from Sleep mode or POR, an

internal delay of ~10 µs is invoked to allow the

memory bias to stabilize before program execution

can begin.

TABLE 13-1:

SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Register

on Page

OSCTUNE

—

TUN4

TUN3

TUN2

TUN1

TUN0

81

Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used by clock sources.

TABLE 13-2:

SUMMARY OF CALIBRATION WORD ASSOCIATED WITH CLOCK SOURCES

Name

Bits

Bit -/7

Bit -/6

Bit 13/5

Bit 12/4

Bit 11/3

Bit 10/2

Bit 9/1

Bit 8/0

Register

on Page

CALWD1

13:8

—

DOV3

DOV2

DOV1

DOV0

57

7:0

—

FCAL6

FCAL5

FCAL4

FCAL3

FCAL2

FCAL1

FCAL0

Legend: — = unimplemented locations read as ‘0’. Shaded cells are not used by clock sources.

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