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PIC16F720-E/ML датащи(PDF) 126 Page - Microchip Technology

номер детали PIC16F720-E/ML
подробное описание детали  20-Pin Flash Microcontrollers with nanoWatt XLP Technology
PDF  244 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F720-E/ML датащи(HTML) 126 Page - Microchip Technology

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PIC16F/LF720/721
DS41430A-page 126
 2010 Microchip Technology Inc.
FIGURE 16-5:
ASYNCHRONOUS RECEPTION
Start
bit
bit 7/8
bit 1
bit 0
bit 7/8
bit 0
Stop
bit
Start
bit
Start
bit
bit 7/8
Stop
bit
RX/DT pin
Reg
Rcv Buffer Reg
Rcv Shift
Read Rcv
Buffer Reg
RCREG
RCIF
(Interrupt Flag)
OERR bit
CREN
Word 1
RCREG
Word 2
RCREG
Stop
bit
Note:
This timing diagram shows three words appearing on the RX input. The RCREG (receive buffer) is read after the third word,
causing the OERR (overrun) bit to be set.
TABLE 16-2:
REGISTERS ASSOCIATED WITH ASYNCHRONOUS RECEPTION
Name
Bit 7
Bit 6Bit 5Bit 4Bit 3Bit 2Bit 1Bit 0
Value on
POR, BOR
Value on
all other
Resets
INTCON
GIE
PEIE
TMR0IE
INTE
RABIE
TMR0IF
INTF
RABIF
0000 000x
0000 000x
PIE1
TMR1GIE
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
0000 0000
0000 0000
PIR1
TMR1GIF
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
0000 0000
0000 0000
RCREG
AUSART Receive Data Register
0000 0000
0000 0000
RCSTA
SPEN
RX9
SREN
CREN
ADDEN
FERR
OERR
RX9D
0000 000x
0000 000x
SPBRG
BRG7
BRG6
BRG5
BRG4
BRG3
BRG2
BRG1
BRG0
0000 0000
0000 0000
TRISC
TRISC7
TRISC6
TRISC5
TRISC4
TRISC3
TRISC2
TRISC1
TRISC0
1111 1111
1111 1111
TXSTA
CSRC
TX9
TXEN
SYNC
—BRGH
TRMT
TX9D
0000 -010
0000 -010
Legend:
x
= unknown, - = unimplemented read as ‘0’. Shaded cells are not used for asynchronous reception.



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