PIC16C774 Microchip Technology Inc., PIC16C774 Datasheet - Page 105

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

FIGURE 9-6:
FIGURE 9-7:
1999 Microchip Technology Inc.
RC7/RX/DT (pin)
Load RSR
Read
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)
RC7/RX/DT
because ADDEN = 1.
USART RECEIVE BLOCK DIAGRAM
ASYNCHRONOUS RECEPTION WITH ADDRESS DETECT
Baud Rate Generator
x64 Baud Rate CLK
Start
bit
SPBRG
Pin Buffer
and Control
RSR<8>
SPEN
bit0
ADDEN
ADDEN
RX9
RX9
Bit8 = 0, Data Byte
bit1
Advance Information
bit8
Data
Recovery
Interrupt
Stop
bit
CREN
or
64
16
Start
bit
Enable
Load of
Receive
Buffer
Bit8 = 1, Address Byte
RCIF
bit0
RCIE
RX9
MSb
Stop
RX9D
(8)
bit8
OERR
7
RSR register
Stop
RCREG register
bit
WORD 1
RCREG
8
Data Bus
PIC16C77X
8
8
1
FERR
0
Start
LSb
DS30275A-page 105
FIFO