PIC16F877A-I/P Microchip Technology, PIC16F877A-I/P Datasheet - Page 54

• Manufacturer Part Number: PIC16F877A-I/P
• Description: IC MCU FLASH 8KX14 EE 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F877A-I/P

• Program Memory Type: FLASH
• Program Memory Size: 14KB (8K x 14)
• Package / Case: 40-DIP (0.600", 15.24mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 368 B
• Interface Type: CCP/I2C/MSSP/SPI/USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 33
• 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, DM163022, DV164120
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 444-1001 - DEMO BOARD FOR PICMICRO MCU
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: PIC16F877AI/P

PICmicro MID-RANGE MCU FAMILY
3.2
3.2.1
DS31003A-page 3-4
Power-on Reset (POR)
Power-on Reset (POR), Power-up Timer (PWRT),
Oscillator Start-up Timer (OST), Brown-out Reset (BOR), and Parity Error Reset (PER)
A Power-on Reset pulse is generated on-chip when V
the POR, just tie the MCLR pin directly (or through a resistor) to V
will eliminate external RC components usually needed to create a Power-on Reset. A minimum
rise time for V
ifications”
Figure 3-2: Using On-Chip POR
When the device exits the reset condition (begins normal operation), the device operating param-
eters (voltage, frequency, temperature, etc.) must be within their operating ranges, otherwise the
device will not function correctly. Ensure the delay is long enough to get all operating parameters
within specification.
Figure 3-3
Reset circuit is only required if V
capacitor quickly when V
Figure 3-3: External Power-on Reset Circuit (For Slow V
Note:
Note:
shows a possible POR circuit for a slow power supply ramp up. The external Power-on
section for details.
R < 40 k
exceed 0.2V. A larger voltage drop will degrade V
DD
The resistor is optional.
is required. See
is recommended to ensure that the voltage drop across R does not
DD
powers down.
V
DD
DD
D
parameter D003
power-up time is too slow. The diode, D, helps discharge the
V
V
DD
DD
R
R
(1)
C
PIC16CXXX
V
MCLR
DD
and
MCLR
V
PIC16CXXX
DD
DD
parameter D004
rise is detected. To take advantage of
DD
IH
Power-up)
DD
level on the MCLR/V
1997 Microchip Technology Inc.
as shown in
in the
“Electrical Spec-
Figure
PP
3-2. This
pin.