PIC18LF8390T-I/PT Microchip Technology, PIC18LF8390T-I/PT Datasheet - Page 37
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PIC18LF8390T-I/PT
Manufacturer Part Number
PIC18LF8390T-I/PT
Description
IC PIC MCU FLASH 4KX16 80TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Specifications of PIC18LF8390T-I/PT
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, HLVD, LCD, POR, PWM, WDT
Number Of I /o
66
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
80-TFQFP
Processor Series
PIC18LF
Core
PIC
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
SPI, I2C, EUSART, AUSART
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
66
Number Of Timers
1 x 8
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DV164136, DM163028
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18LF8390T-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
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2.6.5.1
An adjustment may be required when the AUSART
begins to generate framing errors or receives data with
errors while in Asynchronous mode. Framing errors
indicate that the device clock frequency is too high. To
adjust for this, decrement the value in OSTUNE to
reduce the clock frequency. On the other hand, errors
in data may suggest that the clock speed is too low. To
compensate, increment OSTUNE to increase the clock
frequency.
2.6.5.2
This technique compares device clock speed to some
reference clock. Two timers may be used; one timer is
clocked by the peripheral clock, while the other is
clocked by a fixed reference source, such as the
Timer1 oscillator.
Both timers are cleared, but the timer clocked by the
reference generates interrupts. When an interrupt
occurs, the internally clocked timer is read and both
timers are cleared. If the internally clocked timer value
REGISTER 2-1:
© 2007 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6
bit 5
bit 4-0
Note 1:
INTSRC
R/W-0
Available only in certain oscillator configurations; otherwise, this bit is unavailable and read as ‘0’. See
Section 2.6.4 “PLL in INTOSC Modes” for details.
Compensating with the AUSART
Compensating with the Timers
INTSRC: Internal Oscillator Low-Frequency Source Select bit
1 = 31.25 kHz device clock derived from 8 MHz INTOSC source (divide-by-256 enabled)
0 = 31 kHz device clock derived directly from INTRC internal oscillator
PLLEN: Frequency Multiplier PLL for INTOSC Enable bit
1 = PLL enabled for INTOSC (4 MHz and 8 MHz only)
0 = PLL disabled
Unimplemented: Read as ‘0’
TUN4:TUN0: Frequency Tuning bits
01111 = Maximum frequency
•
•
00001
00000 = Center frequency. Oscillator module is running at the calibrated frequency.
11111
•
•
10000 = Minimum frequency
PLLEN
R/W-0
OSCTUNE: OSCILLATOR TUNING REGISTER
(1)
(1)
W = Writable bit
‘1’ = Bit is set
•
•
•
•
U-0
—
PIC18F6390/6490/8390/8490
R/W-0
TUN4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
is greater than expected, then the internal oscillator
block is running too fast. To adjust for this, decrement
the OSCTUNE register.
2.6.5.3
A CCP module can use free-running Timer1 (or
Timer3), clocked by the internal oscillator block and an
external event with a known period (i.e., AC power
frequency). The time of the first event is captured in the
CCPRxH:CCPRxL registers and is recorded. When the
second event causes a capture, the time of the first
event is subtracted from the time of the second event.
Since the period of the external event is known, the
time difference between events can be calculated.
If the measured time is much greater than the
calculated time, then the internal oscillator block is
running too fast. To compensate, decrement the
OSTUNE register. If the measured time is much less
than the calculated time, then the internal oscillator
block is running too slow. To compensate, increment
the OSTUNE register.
TUN3
(1)
Compensating with the Timers
R/W-0
TUN2
x = Bit is unknown
R/W-0
TUN1
DS39629C-page 35
R/W-0
TUN0
bit 0
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