PIC18F2585_07 Datasheet, PDF (237/482 Pages) Microchip Technology – Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology

PIC18F2585/2680/4585/4680
FIGURE 18-1:
AUTOMATIC BAUD RATE CALCULATION
BRG Value
RX pin
XXXXh
0000h
Start
Edge #1
Bit 0 ^{Bit 1}
Edge #2
Bit 2 ^{Bit 3}
Edge #3
Bit 4 ^{Bit 5}
Edge #4
Bit 6 ^{Bit 7}
001Ch
Edge #5
Stop Bit
BRG Clock
Set by User
ABDEN bit
RCIF bit
(Interrupt)
Read
RCREG
SPBRG
SPBRGH
XXXXh
XXXXh
Note: The ABD sequence requires the EUSART module to be configured in Asynchronous mode and WUE = 0.
Auto-Cleared
1Ch
00h
FIGURE 18-2:
BRG OVERFLOW SEQUENCE
BRG Clock
ABDEN bit
RX pin
ABDOVF bit
BRG Value
XXXXh
Start
Bit 0
0000h
FFFFh
0000h
© 2007 Microchip Technology Inc.
Preliminary
DS39625C-page 235