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PIC16(L)F1508/9
DS40001609E-page 232
2011-2015 Microchip Technology Inc.
22.2
Clock Accuracy with
Asynchronous Operation
The factory calibrates the internal oscillator block out-
put (INTOSC). However, the INTOSC frequency may
drift as V
DD
or temperature changes, and this directly
affects the asynchronous baud rate.
The Auto-Baud Detect feature (see
Section22.4.1 “Auto-Baud Detect”
) can be used to
compensate for changes in the INTOSC frequency.
There may not be fine enough resolution when
adjusting the Baud Rate Generator to compensate for
a gradual change in the peripheral clock frequency.