PIC16F737-I Datasheet, PDF (145/276 Pages) Microchip Technology – 28/40/44-Pin, 8-Bit CMOS Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC16F7X7
FIGURE 11-7:
RC7/RX/DT (pin)
Load RSR
Read
ASYNCHRONOUS RECEPTION WITH ADDRESS DETECT
Start
bit bit 0 bit 1
Start
bit 8 Stop bit bit 0
bit
bit 8 Stop
bit
bit 8 = 0, Data Byte
bit 8 = 1, Address Byte
Word 1
RCREG
RCIF
Note:
This timing diagram shows a data byte followed by an address byte. The data byte is not read into the RCREG (Receive Buffer)
because ADDEN = 1.
FIGURE 11-8:
RC7/RX/DT (pin)
Load RSR
Read
ASYNCHRONOUS RECEPTION WITH ADDRESS BYTE FIRST
Start
bit bit 0 bit 1
Start
bit 8 Stop bit bit 0
bit
bit 8 Stop
bit
bit 8 = 1, Address Byte
bit 8 = 0, Data Byte
Word 1
RCREG
Note:
RCIF
This timing diagram shows a data byte followed by an address byte. The data byte is not read into the RCREG (Receive Buffer)
because ADDEN was not updated and still = 0.
TABLE 11-9: 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, INTCON GIE
10Bh,18Bh
0Ch
PIR1
PSPIF⁽¹⁾
PEIE
ADIF
TMR0IE INT0IE
RCIF TXIF
RBIE
SSPIF
TMR0IF INT0IF RBIF 0000 000x
CCP1IF TMR2IF TMR1IF 0000 0000
0000 000u
0000 0000
18h
RCSTA SPEN RX9 SREN CREN ADDEN FERR OERR RX9D 0000 000x 0000 000x
1Ah
RCREG AUSART Receive Register
0000 0000 0000 0000
8Ch
PIE1
PSPIE⁽¹⁾ ADIE RCIE TXIE SSPIE CCP1IE TMR2IE TMR1IE 0000 0000 0000 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: Bits PSPIE and PSPIF are reserved on 28-pin devices; always maintain these bits clear.
 2004 Microchip Technology Inc.
DS30498C-page 143