PIC16C774 Microchip Technology Inc., PIC16C774 Datasheet - Page 106

• Manufacturer Part Number: PIC16C774
• Description: 28/40-pin, 8-bit Cmos Microcontrollers W/ 12-bit A/d
• Manufacturer: Microchip Technology Inc.

PIC16C77X
FIGURE 9-8:
TABLE 9-7
DS30275A-page 106
Address
0Ch
18h
1Ah
8Ch
98h
99h
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 the 28-pin devices, always maintain these bits clear.
RC7/RX/DT (pin)
Load RSR
Read
RCIF
Note: This timing diagram shows an address byte followed by a data byte. The data byte is not read into the RCREG (receive buffer)
SPBRG
Name
PIR1
RCSTA
RCREG
PIE1
TXSTA
because ADEN was not updated and still = 0.
ASYNCHRONOUS RECEPTION WITH ADDRESS BYTE FIRST
REGISTERS ASSOCIATED WITH ASYNCHRONOUS RECEPTION
USART Receive Register
Baud Rate Generator Register
PSPIF
PSPIE
SPEN
CSRC
Start
Bit 7
bit
(1)
(1)
bit0
ADIE
Bit 6
ADIF
RX9
TX9
Bit8 = 1, Address Byte
bit1
SREN
TXEN
RCIF
RCIE
Bit 5
Advance Information
CREN
SYNC
Bit 4
TXIF
TXIE
bit8
Stop
bit
ADDEN
SSPIE
SSPIF
Bit 3
—
Start
bit
Bit8 = 0, Data Byte
CCP1IF
CCP1IE
BRGH
FERR
bit0
Bit 2
TMR2IF
TMR2IE
OERR
TRMT
Bit 1
bit8
Stop
TMR1IF
TMR1IE
bit
RX9D
TX9D
Bit 0
WORD 1
RCREG
1999 Microchip Technology Inc.
0000 0000
0000 000x
0000 0000
0000 0000
0000 -010
0000 0000
Value on:
POR,
BOR
0000 0000
0000 000x
0000 0000
0000 0000
0000 -010
0000 0000
Value on
all other
Resets