PIC18LF44J50-I/PT Microchip Technology, PIC18LF44J50-I/PT Datasheet - Page 30
![IC PIC MCU FLASH 16K 2V 44-TQFP](/photos/6/82/68251/c04-076_pt_sml.jpg)
PIC18LF44J50-I/PT
Manufacturer Part Number
PIC18LF44J50-I/PT
Description
IC PIC MCU FLASH 16K 2V 44-TQFP
Manufacturer
Microchip Technology
Series
PIC® XLP™ 18Fr
Datasheets
1.PIC18LF24J10-ISS.pdf
(32 pages)
2.PIC18LF24J50-ISS.pdf
(554 pages)
3.PIC18LF24J50-ISS.pdf
(12 pages)
Specifications of PIC18LF44J50-I/PT
Program Memory Type
FLASH
Program Memory Size
16KB (8K x 16)
Package / Case
44-TQFP, 44-VQFP
Core Processor
PIC
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
34
Ram Size
3.8K x 8
Voltage - Supply (vcc/vdd)
2 V ~ 3.6 V
Data Converters
A/D 13x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC18LF
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3776 B
Interface Type
EUSART, I2C, SPI
Maximum Clock Frequency
31 KHz
Number Of Programmable I/os
22
Number Of Timers
5
Operating Supply Voltage
2 V to 3.6 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, DM183022, DM183032, DV164136, MA180024
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 13 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18LF44J50-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
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PIC18F46J50 FAMILY
2.2.1
Because of the unique requirements of the USB module,
a different approach to clock operation is necessary. In
order to use the USB module, a fixed 6 MHz or 48 MHz
clock must be internally provided to the USB module for
operation in either Low-Speed or Full-Speed mode,
respectively. The microcontroller core need not be
clocked at the same frequency as the USB module.
FIGURE 2-1:
DS39931C-page 30
T1OSO
Note 1:
T1OSI
OSC2
OSC1
2:
3:
4:
Secondary Oscillator
OSCILLATOR MODES AND
USB OPERATION
Primary Oscillator
The PLL requires a 4 MHz input and it produces a 96 MHz output. The PLL will not be available until the PLLEN bit
in the OSCTUNE register is set. Once the PLLEN bit is set, the PLL requires up to t
device continues to be clocked at the PLL bypassed frequency.
In order to use the USB module in Full-Speed mode, this node must be run at 48 MHz. For Low-Speed mode, this
node may be run at either 48 MHz or 24 MHz, but the CPDIV bits must be set such that the USB module is clocked
at 6 MHz.
Selecting the Timer1 clock or postscaled internal clock will turn off the primary oscillator (unless required by the
reference clock of Section 2.6 “Reference Clock Output”) and PLL.
The USB module cannot be used to communicate unless the primary clock source is selected.
Oscillator
Internal
PIC18F46J50 FAMILY CLOCK DIAGRAM
INTRC
31 kHz
8 MHz
Block
T1OSCEN
8 MHz
F
OSC
1
0
2
PLLEN
1
0
1
0
500 kHz
250 kHz
125 kHz
÷ 12
÷ 10
31 kHz
8 MHz
4 MHz
2 MHz
1 MHz
÷ 6
÷ 5
÷ 4
÷ 3
÷ 2
÷ 1
OSCCON<6:4>
PLLDIV<2:0>
000
001
010
011
100
101
110
111
OSCTUNE<7>
111
110
101
100
011
010
001
000
÷ 6
÷ 3
÷ 2
÷ 1
4 MHz
(Note 2)
CPDIV<1:0>
A network of MUXes, clock dividers and a fixed 96 MHz
output PLL have been provided, which can be used to
derive various microcontroller core and USB module
frequencies. Figure 2-1 helps in understanding the
oscillator structure of the PIC18F46J50 Family of
devices.
00
01
10
11
96 MHz
PLL
Postscaled
Internal Clock
(1)
Timer1 Clock
FOSC<2:1>
00
÷ 2
Primary Clock
Source
OSCCON<1:0>
48 MHz
(3)
(4)
00
01
11
÷ 8
÷ 4
© 2009 Microchip Technology Inc.
rc
CPDIV<1:0>
to lock. During this time, the
Enabled Modes
10
11
WDT, PWRT, FSCM
and Two-Speed Start-up
Peripherals
CLKO
IDLE
FSEN
1
0
CPU
USB Module
Clock
Needs 48 MHz for FS
Needs 6 MHz for LS
÷ 4
RA6
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