PIC18F1220-I/SO Microchip Technology Inc., PIC18F1220-I/SO Datasheet - Page 143
PIC18F1220-I/SO
Manufacturer Part Number
PIC18F1220-I/SO
Description
Microcontroller; 4 KB Flash; 256 RAM; 256 EEPROM; 16 I/O; 18-Pin-SOIC
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F1220-ISO.pdf
(310 pages)
Specifications of PIC18F1220-I/SO
A/d Inputs
7-Channel, 10-Bit
Cpu Speed
10 MIPS
Eeprom Memory
256 Bytes
Input Output
16
Interface
USART
Memory Type
Flash
Number Of Bits
8
Package Type
18-pin SOIC
Programmable Memory
4K Bytes
Ram Size
256 Bytes
Speed
20 MHz
Timers
1-8-bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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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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