Datasheet

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.