PIC16F887-E/P Microchip Technology, PIC16F887-E/P Datasheet - Page 63

• Manufacturer Part Number: PIC16F887-E/P
• Description: IC PIC MCU FLASH 8KX14 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F887-E/P

• Core Size: 8-Bit
• Program Memory Size: 14KB (8K x 14)
• Mfg Application Notes: Intro to Capacitive Sensing Appl Notes Layout and Physical Design Appl Note
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 368 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Controller Family/series: PIC16F
• No. Of I/o's: 35
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 368Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Package: 40PDIP
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 2.5|3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 35
• Interface Type: I2C/SPI/USART
• On-chip Adc: 14-chx10-bit
• Number Of Timers: 3
• Processor Series: PIC16F
• Core: PIC
• Data Ram Size: 368 B
• Maximum Clock Frequency: 20 MHz
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 53273-916
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM164123, DM164120-3, DV164122
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DVA18XP400 - DEVICE ADAPTER 18F4220 PDIP 40LD
• Lead Free Status / Rohs Status: Details

4.0
4.1
The oscillator module has a wide variety of clock
sources and selection features that allow it to be used
in a wide range of applications while maximizing perfor-
mance and minimizing power consumption. Figure 4-1
illustrates a block diagram of the oscillator module.
Clock sources can be configured from external
oscillators, quartz crystal resonators, ceramic resonators
and Resistor-Capacitor (RC) circuits. In addition, the
system clock source can be configured from one of two
internal oscillators, with a choice of speeds selectable via
software. Additional clock features include:
• Selectable system clock source between external
• Two-Speed Start-up mode, which minimizes
• Fail-Safe Clock Monitor (FSCM) designed to
FIGURE 4-1:
© 2009 Microchip Technology Inc.
or internal via software.
latency between external oscillator start-up and
code execution.
detect a failure of the external clock source (LP,
XT, HS, EC or RC modes) and switch
automatically to the internal oscillator.
OSC2
OSC1
OSCILLATOR MODULE (WITH
FAIL-SAFE CLOCK MONITOR)
Overview
External Oscillator
Internal Oscillator
HFINTOSC
LFINTOSC
31 kHz
8 MHz
SIMPLIFIED PIC
Sleep
®
MCU CLOCK SOURCE BLOCK DIAGRAM
PIC16F882/883/884/886/887
500 kHz
250 kHz
125 kHz
31 kHz
8 MHz
4 MHz
2 MHz
1 MHz
(OSCCON Register)
IRCF<2:0>
111
110
101
100
011
010
001
000
The oscillator module can be configured in one of eight
clock modes.
1.
2.
3.
4.
5.
6.
7.
8.
Clock Source modes are configured by the FOSC<2:0>
bits in the Configuration Word Register 1 (CONFIG1).
The internal clock can be generated from two internal
oscillators. The HFINTOSC is a calibrated high-
frequency oscillator. The LFINTOSC is an uncalibrated
low-frequency oscillator.
LP, XT, HS, RC, RCIO, EC
EC – External clock with I/O on OSC2/CLKOUT.
LP – 32 kHz Low-Power Crystal mode.
XT – Medium Gain Crystal or Ceramic Resonator
Oscillator mode.
HS – High Gain Crystal or Ceramic Resonator
mode.
RC – External Resistor-Capacitor (RC) with
F
RCIO – External Resistor-Capacitor (RC) with I/
O on OSC2/CLKOUT.
INTOSC – Internal oscillator with F
on OSC2 and I/O on OSC1/CLKIN.
INTOSCIO – Internal oscillator with I/O on
OSC1/CLKIN and OSC2/CLKOUT.
OSC
/4 output on OSC2/CLKOUT.
Power-up Timer (PWRT)
Watchdog Timer (WDT)
Fail-Safe Clock Monitor (FSCM)
INTOSC
(Configuration Word Register 1)
(OSCCON Register)
FOSC<2:0>
SCS<0>
(CPU and Peripherals)
DS41291F-page 61
System Clock
OSC
/4 output