PIC18F25J50 MICROCHIP [Microchip Technology], PIC18F25J50 Datasheet - Page 337

• Manufacturer Part Number: PIC18F25J50
• Description: 28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 20-6:
FIGURE 20-7:
 2011 Microchip Technology Inc.
Note: This timing diagram shows three words appearing on the RXx input. The RCREGx (Receive Buffer) is read after
RXx (pin)
Rcv Shift Reg
Rcv Buffer Reg
Read Rcv
Buffer Reg
RCREGx
RCxIF
(Interrupt Flag)
OERR bit
CREN
the third word, causing the OERR (Overrun) bit to be set.
RXx
BRG16
EUSARTx RECEIVE BLOCK DIAGRAM
ASYNCHRONOUS RECEPTION
Start
SPBRGHx
bit
Baud Rate Generator
x64 Baud Rate CLK
SPEN
and Control
bit 0
Pin Buffer
SPBRGx
bit 1
RXDTP
bit 7/8
Interrupt
Recovery
 64
 16
 4
Data
Stop
or
or
bit
CREN
Word 1
RCREGx
Start
bit
Unread Data
PIC18F46J50 FAMILY
bit 0
in FIFO
RX9
RCxIF
RCxIE
Stop
MSb
{
RX9D
bit 7/8
Word 2
RCREGx
(8)
OERR
7
Stop
bit
RSR Register
RCREGx Register

Start
8
bit
Data Bus
1
FERR
0
DS39931D-page 337
bit 7/8
LSb
Start
2-Entry FIFO
Stop
bit