MCP19124 datasheet(106/236 Pages) MICROCHIP

106 / 236 page

MCP19124/5

DS20005619A-page 106

 2016 Microchip Technology Inc.

16.3.1

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 16-1:

SUMMARY OF REGISTERS ASSOCIATED WITH CLOCK SOURCES

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

on Page

OSCTUNE

—

TUN4

TUN3

TUN2

TUN1

TUN0

105

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

TABLE 16-2:

SUMMARY OF CONFIGURATION 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

on Page

CALWD6

13:8

—

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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