Datasheet

Table Of Contents
2011-2013 Microchip Technology Inc. DS41458C-page 259
PIC16(L)F1526/7
FIGURE 22-4: ASYNCHRONOUS TRANSMISSION (BACK-TO-BACK)
Transmit Shift Reg
Write to TXxREG
BRG Output
(Shift Clock)
TXx/CKx
TXxIF bit
(Interrupt Reg. Flag)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
Word 1
Word 2
Word 1
Word 2
Start bit
Stop bit
Start bit
Transmit Shift Reg
Word 1
Word 2
bit 0 bit 1
bit 7/8 bit 0
Note: This timing diagram shows two consecutive transmissions.
1 TCY
1 TCY
pin
TABLE 22-1: SUMMARY OF REGISTERS ASSOCIATED WITH ASYNCHRONOUS TRANSMISSION
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Register
on page
BAUD1CON
ABDOVF RCIDL SCKP BRG16 WUE ABDEN 267
BAUD2CON ABDOVF RCIDL SCKP BRG16 WUE ABDEN 267
INTCON GIE PEIE
TMR0IE INTE IOCIE TMR0IF INTF IOCIF 92
PIE1 TMR1GIE ADIE RC1IE TX1IE SSP1IE CCP1IE TMR2IE TMR1IE 93
PIE4
CCP10IE CCP9IE RC2IE TX2IE CCP8IE CCP7IE BCL2IE SSP2IE 96
PIR1 TMR1GIF ADIF RC1IF TX1IF SSP1IF CCP1IF TMR2IF TMR1IF 97
PIR4
CCP10IF CCP9IF RC2IF TX2IF CCP8IF CCP7IF BCL2IF SSP2IF 96
RC1STA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 266
RC2STA
SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 266
SP1BRGL EUSART1 Baud Rate Generator, Low Byte 268*
SP1BRGH EUSART1 Baud Rate Generator, High Byte 268*
SP2BRGL EUSART2 Baud Rate Generator, Low Byte 268*
SP2BRGH EUSART2 Baud Rate Generator, High Byte 268*
TX1REG EUSART1 Transmit Register 257*
TX1STA
CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D 265
TX2REG EUSART2 Transmit Register 257*
TX2STA
CSRC TX9 TXEN SYNC SENDB BRGH TRMT TX9D 265
Legend: — = unimplemented locations, read as ‘0. Shaded bits are not used for asynchronous transmission.
* Page provides register information.