PIC18LF24K Datasheet, PDF (393/594 Pages) –

PIC18(L)F26/45/46K40
FIGURE 27-4:
Write to TXxREG
BRG Output
(Shift Clock)
TXx/CKx
pin
TXxIF bit
(Transmit Buffer
Reg. Empty Flag)
TRMT bit
(Transmit Shift
Reg. Empty Flag)
ASYNCHRONOUS TRANSMISSION (BACK-TO-BACK)
Word 1
Word 2
1 TCY
Start bit
Word 1
Transmit Shift Reg.
bit 0
1 TCY
bit 1
Word 1
bit 7/8 _{Stop bit}
Start bit
bit 0
Word 2
Word 2
Transmit Shift Reg.
Note:
This timing diagram shows two consecutive transmissions.
TABLE 27-1: 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
BAUDxCON
ABDOVF
RCIDL
—
SCKP BRG16
—
WUE
ABDEN
INTCON
GIE/GIEH PEIE/GIEL IPEN
—
—
INT2EDG INT1EDG INT0EDG
PIE3
RC2IE
TX2IE
RC1IE TX1IE BCL2IE SSP2IE BCL1IE SSP1IE
PIR3
RC2IF
TX2IF
RC1IF TX1IF BCL2IF SSP2IF BCL1IF SSP1IF
IPR3
RC2IP
TX2IP
RC1IP TX1IP BCL2IP SSP2IP BCL1IP SSP1IP
RCxSTA
SPEN
RX9
SREN CREN ADDEN FERR
OERR
RX9D
RxyPPS
—
—
—
RxyPPS<4:0>
TXxPPS
—
—
—
TXPPS<4:0>
SPxBRGH
EUSARTx Baud Rate Generator, High Byte
SPxBRGL
EUSARTx Baud Rate Generator, Low Byte
TXxREG
EUSARTx Transmit Register
TXxSTA
CSRC
TX9
TXEN
SYNC SENDB
BRGH
TRMT
TX9D
Legend: — = unimplemented location, read as ‘0’. Shaded cells are not used for asynchronous transmission.
* Page provides register information.
390
169
173
173
189
389
217
215
399*
399*
391*
388
 2016 Microchip Technology Inc.
Preliminary
DS40001816C-page 393