PIC16F887-E/P Microchip Technology Inc., PIC16F887-E/P Datasheet - Page 85
PIC16F887-E/P
Manufacturer Part Number
PIC16F887-E/P
Description
40 PIN, 14KB FLASH, 368 RAM, 36 I/O, PDIP
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16F887-EP.pdf
(328 pages)
Specifications of PIC16F887-E/P
A/d Inputs
14-Channel, 10-Bit
Comparators
2
Cpu Speed
5 MIPS
Eeprom Memory
256 Bytes
Frequency
20 MHz
Input Output
35
Interface
I2C/SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
40-pin PDIP
Programmable Memory
14K Bytes
Ram Size
368 Bytes
Resistance, Drain To Source On
Bytes
Serial Interface
MSSP or EUSART
Speed
20 MHz
Timers
2-8-bit, 1-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
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Quantity
Price
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Part Number:
PIC16F887-E/P
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TI
Quantity:
12 000
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8.0
Comparators are used to interface analog circuits to a
digital circuit by comparing two analog voltages and
providing a digital indication of their relative magnitudes.
The comparators are very useful mixed signal building
blocks because they provide analog functionality
independent of the program execution. The analog
comparator module includes the following features:
• Independent comparator control
• Programmable input selection
• Comparator output is available internally/externally
• Programmable output polarity
• Interrupt-on-change
• Wake-up from Sleep
• PWM shutdown
• Timer1 gate (count enable)
• Output synchronization to Timer1 clock input
• SR Latch
• Programmable and fixed voltage reference
© 2008 Microchip Technology Inc.
Note:
COMPARATOR MODULE
Only Comparator C2 can be linked to
Timer1.
PIC16F882/883/884/886/887
8.1
A single comparator is shown in Figure 8-1 along with
the relationship between the analog input levels and
the digital output. When the analog voltage at V
less than the analog voltage at V
comparator is a digital low level. When the analog
voltage at V
V
FIGURE 8-1:
IN
Output
Note:
-, the output of the comparator is a digital high level.
V
V
V
V
IN
IN
IN
IN
Comparator Overview
+
-
-
+
The black areas of the output of the
comparator represents the uncertainty
due to input offsets and response time.
IN
+ is greater than the analog voltage at
+
–
SINGLE COMPARATOR
IN
-, the output of the
DS41291E-page 83
Output
IN
+ is
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