PIC18F1220 MICROCHIP [Microchip Technology], PIC18F1220 Datasheet - Page 143
![no-image](/images/no-image-200.jpg)
PIC18F1220
Manufacturer Part Number
PIC18F1220
Description
18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-bit A/D and nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F1220.pdf
(310 pages)
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PIC18F1220-E/SO
Manufacturer:
MICROCHIP/微芯
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To set up an Asynchronous Transmission:
1.
2.
3.
4.
FIGURE 16-2:
FIGURE 16-3:
2004 Microchip Technology Inc.
Reg. Empty Flag)
Reg. Empty Flag)
Write to TXREG
(Transmit Buffer
Initialize the SPBRGH:SPBRG registers for the
appropriate baud rate. Set or clear the BRGH
and BRG16 bits, as required, to achieve the
desired baud rate.
Enable the asynchronous serial port by clearing
bit SYNC and setting bit SPEN.
If interrupts are desired, set enable bit TXIE.
If 9-bit transmission is desired, set transmit bit
TX9. Can be used as address/data bit.
(Transmit Shift
CK/INT1 (pin)
RB1/AN5/TX/
BRG Output
(Shift Clock)
BRG16
TRMT bit
TXIF bit
TXIE
Interrupt
SPBRGH
Baud Rate Generator
TXIF
TXEN
EUSART TRANSMIT BLOCK DIAGRAM
ASYNCHRONOUS TRANSMISSION
Word 1
Transmit Shift Reg
Word 1
Baud Rate CLK
SPBRG
1 T
CY
Start bit
MSb
(8)
TX9D
TXREG Register
bit 0
TSR Register
TX9
8
Data Bus
bit 1
Word 1
5.
6.
7.
If using interrupts, ensure that the GIE and PEIE bits in
the INTCON register (INTCON<7:6>) are set.
Enable the transmission by setting bit TXEN,
which will also set bit TXIF.
If 9-bit transmission is selected, the ninth bit
should be loaded in bit TX9D.
Load data to the TXREG register (starts
transmission).
LSb
0
PIC18F1220/1320
TRMT
and Control
Pin Buffer
bit 7/8
SPEN
RB1/AN5/TX/CK/INT1 pin
Stop bit
DS39605C-page 141
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