PIC16F684-ISL

Manufacturer Part NumberPIC16F684-ISL
ManufacturerMicrochip Technology Inc.
PIC16F684-ISL datasheets
 


Specifications of PIC16F684-ISL

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3.4.2.1
OSCTUNE Register
The HFINTOSC is factory calibrated but can be
adjusted in software by writing to the OSCTUNE
register (Register 3-1).
The OSCTUNE register has a tuning range of ±12%.
The default value of the OSCTUNE register is ‘0’. The
value is a 5-bit two’s complement number. Due to
process variation, the monotonicity and frequency step
cannot be specified.
REGISTER 3-1:
OSCTUNE – OSCILLATOR TUNING RESISTOR (ADDRESS: 90h)
U-0
bit 7
bit 7-5
Unimplemented: Read as ‘0’
bit 4-0
TUN<4:0>: Frequency Tuning bits
01111 = Maximum frequency
01110 =
00001 =
00000 = Oscillator module is running at the calibrated frequency.
11111 =
10000 = Minimum frequency
Legend:
R = Readable bit
-n = Value at POR
 2004 Microchip Technology Inc.
When the OSCTUNE register is modified, the
HFINTOSC frequency will begin shifting to the new
frequency. The HFINTOSC clock will stabilize within
1 ms. 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.
U-0
U-0
R/W-0
R/W-0
TUN4
TUN3
W = Writable bit
U = Unimplemented bit, read as ‘0’
‘1’ = Bit is set
‘0’ = Bit is cleared
Preliminary
PIC16F684
R/W-0
R/W-0
R/W-0
TUN2
TUN1
TUN0
bit 0
x = Bit is unknown
DS41202C-page 23