PIC16F887-E/P Microchip Technology Inc., PIC16F887-E/P Datasheet - Page 68
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
Company:
Part Number:
PIC16F887-E/P
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TI
Quantity:
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Part Number:
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Manufacturer:
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PIC16F882/883/884/886/887
4.5.2.1
The HFINTOSC is factory calibrated but can be
adjusted in software by writing to the OSCTUNE
register (Register 4-2).
The default value of the OSCTUNE register is ‘0’. The
value is a 5-bit two’s complement number.
REGISTER 4-2:
DS41291E-page 66
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-5
bit 4-0
U-0
—
OSCTUNE Register
Unimplemented: Read as ‘0’
TUN<4:0>: Frequency Tuning bits
01111 = Maximum frequency
01110 =
•
•
•
00001 =
00000 = Oscillator module is running at the factory-calibrated frequency.
11111 =
•
•
•
10000 = Minimum frequency
U-0
—
OSCTUNE: OSCILLATOR TUNING REGISTER
W = Writable bit
‘1’ = Bit is set
U-0
—
R/W-0
TUN4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
When the OSCTUNE register is modified, the
HFINTOSC frequency will begin shifting to the new
frequency. Code execution continues during this shift.
There is no indication that the shift has occurred.
OSCTUNE does not affect the LFINTOSC frequency.
Operation of features that depend on the LFINTOSC
clock source frequency, such as the Power-up Timer
(PWRT), Watchdog Timer (WDT), Fail-Safe Clock
Monitor (FSCM) and peripherals, are not affected by the
change in frequency.
TUN3
R/W-0
TUN2
© 2008 Microchip Technology Inc.
x = Bit is unknown
R/W-0
TUN1
R/W-0
TUN0
bit 0
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