PIC18F448-I/PT Microchip Technology, PIC18F448-I/PT Datasheet - Page 21
PIC18F448-I/PT
Manufacturer Part Number
PIC18F448-I/PT
Description
IC PIC MCU FLASH 8KX16 44TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC18LF242-ISO.pdf
(36 pages)
2.PIC18F248-ISO.pdf
(402 pages)
3.PIC18F248-ISO.pdf
(8 pages)
Specifications of PIC18F448-I/PT
Core Size
8-Bit
Program Memory Size
16KB (8K x 16)
Core Processor
PIC
Speed
40MHz
Connectivity
CAN, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
33
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Controller Family/series
PIC18
No. Of I/o's
33
Eeprom Memory Size
256Byte
Ram Memory Size
768Byte
Cpu Speed
40MHz
No. Of Timers
4
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
SPI, I2C, USART
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
33
Number Of Timers
4 bit
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, DV164136, DM163011
Minimum Operating Temperature
- 40 C
On-chip Adc
8
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
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F448-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
PIC18F448-I/PT
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
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2.4
The EC and ECIO Oscillator modes require an external
clock source to be connected to the OSC1 pin. The
feedback device between OSC1 and OSC2 is turned
off in these modes to save current. There is no oscilla-
tor start-up time required after a Power-on Reset or
after a recovery from Sleep mode.
In the EC Oscillator mode, the oscillator frequency
divided by 4 is available on the OSC2 pin. This signal
may be used for test purposes or to synchronize other
logic. Figure 2-3 shows the pin connections for the EC
Oscillator mode.
FIGURE 2-3:
The ECIO Oscillator mode functions like the EC mode,
except that the OSC2 pin becomes an additional
general purpose I/O pin. Figure 2-4 shows the pin
connections for the ECIO Oscillator mode.
FIGURE 2-5:
© 2006 Microchip Technology Inc.
Clock from
Ext. System
External Clock Input
OSC1
OSC2
F
OSC
/4
Crystal
EXTERNAL CLOCK INPUT
OPERATION (EC OSC
CONFIGURATION)
PLL BLOCK DIAGRAM
Osc
OSC1
OSC2
PIC18FXX8
F
F
OUT
IN
Comparator
Phase
FOSC2:FOSC0 = 110
Loop
Filter
Divide by 4
FIGURE 2-4:
2.5
A Phase Locked Loop circuit is provided as a program-
mable option for users that want to multiply the
frequency of the incoming crystal oscillator signal by 4.
For an input clock frequency of 10 MHz, the internal
clock frequency will be multiplied to 40 MHz. This is
useful for customers who are concerned with EMI due
to high-frequency crystals.
The PLL can only be enabled when the oscillator
configuration bits are programmed for HS mode. If they
are programmed for any other mode, the PLL is not
enabled and the system clock will come directly from
OSC1.
The PLL is one of the modes of the FOSC2:FOSC0
configuration bits. The oscillator mode is specified
during device programming.
A PLL lock timer is used to ensure that the PLL has
locked before device execution starts. The PLL lock
timer has a time-out referred to as T
Clock from
Ext. System
HS4 (PLL)
VCO
EXTERNAL CLOCK INPUT
OPERATION (ECIO
CONFIGURATION)
PIC18FXX8
OSC1
I/O (OSC2)
PIC18FXX8
PLL
DS41159E-page 19
.
SYSCLK
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