PIC18F4320-I/PT Microchip Technology, PIC18F4320-I/PT Datasheet - Page 25

• Manufacturer Part Number: PIC18F4320-I/PT
• Description: IC MCU FLASH 4KX16 A/D 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F4320-I/PT

• Core Size: 8-Bit
• Program Memory Size: 8KB (4K x 16)
• Core Processor: PIC
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 36
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Controller Family/series: PIC18
• No. Of I/o's: 36
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 512Byte
• Cpu Speed: 40MHz
• No. Of Timers: 4
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPAC164305 - MODULE SKT FOR PM3 44TQFP444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

2.6.2
The internal oscillator block is calibrated at the factory
to produce an INTOSC output frequency of approxi-
mately
Table 26-8.)
The INTOSC frequency can be adjusted using the
TUN5:TUN1
OSCTUNE<5:1>. OSCTUNE<0> has no effect, but is
readable and writable, enabling changes of the
INTOSC frequency using two increment or decrement
instructions.
The internal oscillator’s output can be adjusted in the
user’s application. This is done by writing to the
OSCTUNE
sensitivity is constant throughout the tuning range.
REGISTER 2-1:
© 2007 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-6
bit 5-1
bit 0
U-0
—
8 MHz.
OSCTUNE REGISTER
register
bits
Unimplemented: Read as ‘0’
TUN<5:1>: Frequency Tuning bits – Adjusts the frequency of INTOSC. Can adjust INTRC, depending
on TUNSEL (OSCTUN2<7>)
011111 = Maximum frequency
•
•
000001
000000 = Center frequency. Oscillator module is running at the calibrated frequency.
111111
•
•
100000 = Minimum frequency
TUN<0>: A placeholder with no effect on the INTRC frequency. Provided to facilitate incrementation
and decrementation of the OSCTUN2 register and adjustment of the INTRC frequency.
(See
U-0
in
—
OSCTUNE: OSCILLATOR TUNING REGISTER
(Register 2-1).
the
parameters
W = Writable bit
‘1’ = Bit is set
OSCTUNE
R/W-0
TUN5
•
•
•
•
F14–F19
The
PIC18F2220/2320/4220/4320
register
tuning
R/W-0
TUN4
in
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
TUN3
When the OSCTUNE register is modified, the INTOSC
and INTRC frequencies begin shifting to the new fre-
quency. The INTOSC and INTRC clocks will stabilize at
the new frequency within 100 μs. Code execution
continues during this shift.
There is no indication when the shift occurs. Operation
of features that depend on the INTRC clock source
frequency also will be affected by the change in
frequency. This includes the WDT, Fail-Safe Clock
Monitor and peripherals.
R/W-0
TUN2
x = Bit is unknown
R/W-0
TUN1
DS39599G-page 23
R/W-0
TUN0
bit 0