PIC12F683-E/P Microchip Technology Inc., PIC12F683-E/P Datasheet - Page 25

• Manufacturer Part Number: PIC12F683-E/P
• Description: 8 PIN, 3.5 KB FLASH, 128 RAM, 6 I/O, PDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC12F683-E/P

• A/d Inputs: 4 Channel, 10-Bit
• Comparators: 1
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Frequency: 20 MHz
• Input Output: 6
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 8-pin PDIP
• Programmable Memory: 3.5K Bytes
• Ram Size: 128 Bytes
• Serial Interface: None
• 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

3.4.2.1
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 pro-
cess variation, the monotonicity and frequency step
cannot be specified.
REGISTER 3-1:
 2004 Microchip Technology Inc.
bit 7-5
bit 4-0
OSCTUNE Register
OSCTUNE – OSCILLATOR TUNING RESISTOR (ADDRESS: 90h)
bit 7
Unimplemented: Read as ‘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
U-0
—
U-0
—
U-0
Preliminary
—
W = Writable bit
‘1’ = Bit is set
R/W-0
TUN4
When the OSCTUNE register is modified, the
HFINTOSC frequency will begin shifting to the new fre-
quency. 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.
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
TUN3
R/W-0
TUN2
PIC12F683
x = Bit is unknown
R/W-0
TUN1
DS41211B-page 23
R/W-0
TUN0
bit 0