PIC18F23K20 MICROCHIP [Microchip Technology], PIC18F23K20 Datasheet - Page 238

• Manufacturer Part Number: PIC18F23K20
• Description: 28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F2XK20/4XK20
FIGURE 18-2:
The operation of the EUSART module is controlled
through three registers:
• Transmit Status and Control (TXSTA)
• Receive Status and Control (RCSTA)
• Baud Rate Control (BAUDCON)
These
Register 18-2 and Register 18-3, respectively.
For all modes of EUSART operation, the TRIS control
bits corresponding to the RX/DT and TX/CK pins should
be set to ‘1’. The EUSART control will automatically
reconfigure the pin from input to output, as needed.
When the receiver or transmitter section is not enabled
then the corresponding RX or TX pin may be used for
general purpose input and output.
DS41303G-page 238
BRG16
Baud Rate Generator
SPBRGH
registers
SPBRG
RX/DT pin
are
+ 1
EUSART RECEIVE BLOCK DIAGRAM
detailed
Multiplier
BRG16
SYNC
BRGH
Pin Buffer
and Control
in
1 X 0 0
X 1 1 0
X 1 0 1
x4
Register 18-1,
x16 x64
F
OSC
0
0
0
n
Data
Recovery
÷ n
FERR
Stop
MSb
CREN
(8)
RX9D
7
RX9
RSR Register
 2010 Microchip Technology Inc.
RCREG Register
• • •
OERR
8
1
RCIF
RCIE
Data Bus
0
START
LSb
RCIDL
Interrupt
FIFO