PIC16F874-10E/P Microchip Technology, PIC16F874-10E/P Datasheet - Page 35

• Manufacturer Part Number: PIC16F874-10E/P
• Description: IC MCU FLASH 4KX14 EE 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F874-10E/P

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PIC16F87410E/P

2.3.1
1997 Microchip Technology Inc.
Oscillator / Resonator Start-up
As the device voltage increases from V
required for the oscillator to start oscillating depends on many factors. These include:
• Crystal / resonator frequency
• Capacitor values used (C1 and C2 in
• Device V
• System temperature
• Series resistor value (and type) if used (Rs in
• Oscillator mode selection of device (which selects the gain of the internal oscillator inverter)
• Crystal quality
• Oscillator circuit layout
• System noise
Figure 2-2
oscillator waveform can be quite low (less than 50% of device V
tered at V
Figure 2-2: Example Oscillator / Resonator Start-up Characteristics
DD
DD
graphs an example oscillator / resonator start-up. The peak-to-peak voltage of the
Maximum V
/2 (refer to
rise time
DD
parameters D033
of System
Voltage
0V
Crystal Start-up Time
Figure
and
Section 2. Oscillator
SS
Device V
, the oscillator will start its oscillations. The time
D043
2-1)
Figure
in the
DD
2-1)
“Electrical Specifications”
Time
DD
) where the waveform is cen-
DS31002A-page 2-5
section).
2