Datasheet

 2013-2015 Microchip Technology Inc. DS40001723D-page 183
PIC12(L)F1571/2
TABLE 21-2: SUMMARY OF REGISTERS ASSOCIATED WITH ASYNCHRONOUS RECEPTION
21.2 Clock Accuracy with
Asynchronous Operation
The factory calibrates the Internal Oscillator Block
(INTOSC) output. However, the INTOSC frequency
may drift as VDD or temperature changes, and this
directly affects the asynchronous baud rate.
The Auto-Baud Detect feature (see Section 21.4.1
“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.
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Register
on Page
BAUDCON
ABDOVF RCIDL — SCKP BRG16 —WUEABDEN 186
INTCON GIE PEIE TMR0IE INTE IOCIE TMR0IF INTF IOCIF 74
PIE1
TMR1GIE ADIE RCIE
(1)
TXIE
(1)
— — TMR2IE TMR1IE 75
PIR1 TMR1GIF ADIF RCIF
(1)
TXIF
(1)
— — TMR2IF TMR1IF 78
RCREG EUSART Receive Data Register 180*
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 185*
SPBRGL BRG<7:0> 187*
SPBRGH BRG<15:8> 187*
TXSTA
CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D 184
Legend: — = unimplemented location, read as ‘0’. Shaded cells are not used for asynchronous reception.
* Page provides register information.
Note 1: PIC12(L)F1572 only.