PIC18LF4455T-I/PT Microchip Technology, PIC18LF4455T-I/PT Datasheet - Page 155
![IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,44PIN,PLASTIC](/photos/6/82/68251/c04-076_pt_sml.jpg)
PIC18LF4455T-I/PT
Manufacturer Part Number
PIC18LF4455T-I/PT
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,TQFP,44PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PCM18XR1.pdf
(438 pages)
3.PIC18F2221-ISO.pdf
(46 pages)
4.PIC18F2455-ISO.pdf
(14 pages)
5.PIC18F2455-ISO.pdf
(8 pages)
6.PIC18F2455-ISO.pdf
(26 pages)
Specifications of PIC18LF4455T-I/PT
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
48MHz
Connectivity
I²C, SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, HLVD, POR, PWM, WDT
Number Of I /o
35
Program Memory Size
24KB (12K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
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
Processor Series
PIC18LF
Core
PIC
Data Bus Width
8 bit
Data Ram Size
2 KB
Interface Type
SPI, I2C, EAUSART
Maximum Clock Frequency
48 MHz
Number Of Programmable I/os
35
Number Of Timers
4
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, DM163025
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 13 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18LF4455T-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PCM18XR1 PDF datasheet #2
- PIC18F2221-ISO PDF datasheet #3
- PIC18F2455-ISO PDF datasheet #4
- PIC18F2455-ISO PDF datasheet #5
- PIC18F2455-ISO PDF datasheet #6
- Current page: 155 of 438
- Download datasheet (7Mb)
16.4
The Enhanced PWM mode provides additional PWM
output options for a broader range of control applica-
tions. The module is a backward compatible version of
the standard CCP module and offers up to four outputs,
designated P1A through P1D. Users are also able to
select the polarity of the signal (either active-high or
active-low). The module’s output mode and polarity are
configured
CCP1M3:CCP1M0 bits of the CCP1CON register.
Figure 16-1 shows a simplified block diagram of PWM
operation. All control registers are double-buffered and
are loaded at the beginning of a new PWM cycle (the
period boundary when Timer2 resets) in order to
prevent glitches on any of the outputs. The exception is
the PWM Dead-Band Delay register, ECCP1DEL,
which is loaded at either the duty cycle boundary or the
boundary period (whichever comes first). Because of
the buffering, the module waits until the assigned timer
resets instead of starting immediately. This means that
Enhanced PWM waveforms do not exactly match the
standard PWM waveforms, but are instead offset by
one full instruction cycle (4 T
As before, the user must manually configure the
appropriate TRIS bits for output.
FIGURE 16-1:
© 2009 Microchip Technology Inc.
Enhanced PWM Mode
Note: The 8-bit TMR2 register is concatenated with the 2-bit internal Q clock, or 2 bits of the prescaler, to create the 10-bit time
CCPR1H (Slave)
Duty Cycle Registers
Comparator
by
CCPR1L
PR2
base.
TMR2
Comparator
setting
SIMPLIFIED BLOCK DIAGRAM OF THE ENHANCED PWM MODULE
(Note 1)
OSC
the
Clear Timer,
set CCP1 pin and
latch D.C.
CCP1CON<5:4>
).
P1M1:P1M0
R
S
PIC18F2455/2550/4455/4550
P1M1:P1M0
Q
and
ECCP1DEL
Controller
Output
16.4.1
The PWM period is specified by writing to the PR2
register. The PWM period can be calculated using the
following equation:
EQUATION 16-1:
PWM frequency is defined as 1/ [PWM period]. When
TMR2 is equal to PR2, the following three events occur
on the next increment cycle:
• TMR2 is cleared
• The CCP1 pin is set (if PWM duty cycle = 0%, the
• The PWM duty cycle is copied from CCPR1L into
2
CCP1/P1A
CCP1 pin will not be set)
CCPR1H
Note:
P1C
P1D
P1B
PWM Period = [(PR2) + 1] • 4 • T
4
CCP1M3:CCP1M0
PWM PERIOD
The Timer2 postscaler (see Section 13.0
“Timer2 Module”) is not used in the
determination of the PWM frequency. The
postscaler could be used to have a servo
update rate at a different frequency than
the PWM output.
TRISD<4>
TRISD<5>
TRISD<6>
TRISD<7>
(TMR2 Prescale Value)
CCP1/P1A
P1B
P1C
P1D
DS39632E-page 153
OSC
•
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