PIC16F627-04/SO Microchip Technology Inc., PIC16F627-04/SO Datasheet - Page 77

• Manufacturer Part Number: PIC16F627-04/SO
• Description: 18 PIN, 1.75 KB FLASH, 224 RAM, 16 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F627-04/SO

• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 128 Bytes
• Input Output: 16
• Interface: SCI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 18-pin SOIC
• Programmable Memory: 1.75K Bytes
• Ram Size: 224 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

FIGURE 12-5:
Steps to follow when setting up an Asynchronous
Transmission:
1.
2.
3.
4.
5.
6.
7.
FIGURE 12-6:
 2003 Microchip Technology Inc.
RB2/TX/CK (pin)
Initialize the SPBRG register for the appropriate
baud rate. If a high speed baud rate is desired,
set bit BRGH. (Section 12.1)
Enable the asynchronous serial port by clearing
bit SYNC and setting bit SPEN.
If interrupts are desired, then set enable bit
TXIE.
If 9-bit transmission is desired, then set transmit
bit TX9.
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).
Write to TXREG
TXIF bit
(Transmit buffer
reg. empty flag)
TRMT bit
(Transmit shift
reg. empty flag)
BRG output
(shift clock)
TXIE
Interrupt
USART TRANSMIT BLOCK DIAGRAM
ASYNCHRONOUS TRANSMISSION
TXEN
TXIF
Baud Rate Generator
WORD 1
Transmit Shift Reg
Word 1
SPBRG
Baud Rate CLK
START Bit
MSb
(8)
TX9D
Bit 0
Preliminary
TSR register
TX9
TXREG register
2 2 2
8
Data Bus
Bit 1
WORD 1
LSb
0
TRMT
Pin Buffer
and Control
Bit 7/8
SPEN
PIC16F62X
STOP Bit
RB2/TX/CK pin
DS40300C-page 75