PIC16LF648A-I/P Microchip Technology, PIC16LF648A-I/P Datasheet - Page 79

• Manufacturer Part Number: PIC16LF648A-I/P
• Description: IC PIC MCU FLASH 4KX14 18DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16LF648A-I/P

• Program Memory Type: FLASH
• Program Memory Size: 7KB (4K x 14)
• Package / Case: 18-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16LF
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SCI/USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

FIGURE 12-5:
Follow these steps when setting up an Asynchronous
Transmission:
1.
2.
3.
4.
5.
6.
7.
8.
FIGURE 12-6:
 2004 Microchip Technology Inc.
RB2/TX/CK (pin)
TRISB<1> bit needs to be set and TRISB<2> bit
cleared in order to configure pins RB2/TX/CK
and RB1/RX/DT as the Universal Synchronous
Asynchronous Receiver Transmitter pins.
Initialize the SPBRG register for the appropriate
baud rate. If a high-speed baud rate is desired,
set bit BRGH. (Section 12.1 "USART Baud
Rate Generator (BRG)")
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
TXIF
TXEN
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
PIC16F627A/628A/648A
8
Data Bus
Bit 1
WORD 1
LSb
0
TRMT
Pin Buffer
and Control
Bit 7/8
SPEN
Stop Bit
RB2/TX/CK pin
DS40044B-page 77