PIC16F84A-04E/SO Microchip Technology, PIC16F84A-04E/SO Datasheet - Page 348

• Manufacturer Part Number: PIC16F84A-04E/SO
• Description: IC MCU CMOS 4MHZ 1K FLASH 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F84A-04E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 13
• Program Memory Size: 1.75KB (1K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 68 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 18-SOIC (7.5mm Width)
• For Use With: I3-DB16F84A - BOARD DAUGHTER ICEPIC3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Connectivity: -

PICmicro MID-RANGE MCU FAMILY
DS31018A-page 18-12
RX (pin)
Rcv shift
reg
Rcv buffer reg
Read Rcv
buffer reg
RCREG
RCIF
(interrupt flag)
OERR bit
CREN
Note: This timing diagram shows three words appearing on the RX input. The RCREG (receive buffer) is read after the third word,
causing the OERR (overrun) bit to be set.
Start
Steps to follow when setting up an Asynchronous Reception:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Figure 18-5:
bit
Initialize the SPBRG register for the appropriate baud rate. If a high speed baud rate is
desired, set bit BRGH. (Subsection
Enable the asynchronous serial port by clearing the SYNC bit, and setting the SPEN bit.
If interrupts are desired, then set the RCIE, GIE and PEIE bits.
If 9-bit reception is desired, then set the RX9 bit.
Enable the reception by setting the CREN bit.
The RCIF flag bit will be set when reception is complete and an interrupt will be generated
if the RCIE bit was set.
Read the RCSTA register to get the ninth bit (if enabled) and determine if any error
occurred during reception.
Read the 8-bit received data by reading the RCREG register.
If any error occurred, clear the error by clearing the CREN bit.
bit0
bit1
Asynchronous Reception
bit7/8
Stop
bit
WORD 1
RCREG
Start
bit
18.3 “USART Baud Rate Generator (BRG)”
bit0
bit7/8
WORD 2
RCREG
Stop
bit
Start
bit
1997 Microchip Technology Inc.
bit7/8
Stop
bit
).