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16F87 데이터시트(PDF) 107 Page - Microchip Technology

부품명 16F87
상세설명  18/20/28-Pin Enhan lashMicrocontrollers with nanoWatt Technology
PDF  228 Pages
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제조업체  MICROCHIP [Microchip Technology]
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16F87 데이터시트(HTML) 107 Page - Microchip Technology

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 2005 Microchip Technology Inc.
DS30487C-page 105
PIC16F87/88
When setting up an asynchronous reception, follow
these steps:
1.
Initialize the SPBRG register for the appropriate
baud rate. If a high-speed baud rate is desired,
set bit BRGH (Section 11.1 “AUSART Baud
Rate Generator (BRG)”).
2.
Enable the asynchronous serial port by clearing
bit SYNC and setting bit SPEN.
3.
If interrupts are desired, then set enable bit
RCIE.
4.
If 9-bit reception is desired, then set bit RX9.
5.
Enable the reception by setting bit CREN.
6.
Flag bit RCIF will be set when reception is com-
plete and an interrupt will be generated if enable
bit RCIE is set.
7.
Read the RCSTA register to get the ninth bit (if
enabled) and determine if any error occurred
during reception.
8.
Read the 8-bit received data by reading the
RCREG register.
9.
If any error occurred, clear the error by clearing
enable bit CREN.
10. If using interrupts, ensure that GIE and PEIE
(bits 7 and 6) of the INTCON register are set.
TABLE 11-8:
REGISTERS ASSOCIATED WITH ASYNCHRONOUS RECEPTION
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR, BOR
Value on
all other
Resets
0Bh, 8Bh,
10Bh,18Bh
INTCON
GIE
PEIE
TMR0IE INT0IE
RBIE
TMR0IF
INT0IF
RBIF
0000 000x
0000 000u
0Ch
PIR1
—
ADIF(1)
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
-000 0000
-000 0000
18h
RCSTA
SPEN
RX9
SREN
CREN
ADDEN
FERR
OERR
RX9D
0000 000x
0000 000x
1Ah
RCREG AUSART Receive Data Register
0000 0000
0000 0000
8Ch
PIE1
—
ADIE(1)
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE TMR1IE
-000 0000
-000 0000
98h
TXSTA
CSRC
TX9
TXEN
SYNC
—BRGH
TRMT
TX9D
0000 -010
0000 -010
99h
SPBRG
Baud Rate Generator Register
0000 0000
0000 0000
Legend:
x
= unknown, - = unimplemented locations read as ‘0’. Shaded cells are not used for asynchronous reception.
Note
1:
This bit is only implemented on the PIC16F88. The bit will read ‘0’ on the PIC16F87.



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