PIC18F2220-E/SO Microchip Technology, PIC18F2220-E/SO Datasheet - Page 140
![IC MCU FLASH 2KX16 EEPROM 28SOIC](/photos/6/59/65909/150-28-soic_sml.jpg)
PIC18F2220-E/SO
Manufacturer Part Number
PIC18F2220-E/SO
Description
IC MCU FLASH 2KX16 EEPROM 28SOIC
Manufacturer
Microchip Technology
Series
PIC® 18Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC18F2220-ISO.pdf
(394 pages)
3.PIC18F2220-ISO.pdf
(6 pages)
4.PIC18F2220-ISO.pdf
(6 pages)
5.PIC18F2220-ISO.pdf
(8 pages)
6.PIC18F2220-ISO.pdf
(6 pages)
7.PIC18F2220-ISO.pdf
(6 pages)
Specifications of PIC18F2220-E/SO
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
25
Program Memory Size
4KB (2K x 16)
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 10x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC18F2220-E/SO
Manufacturer:
MIC
Quantity:
20 000
- PIC16F616T-ISL PDF datasheet
- PIC18F2220-ISO PDF datasheet #2
- PIC18F2220-ISO PDF datasheet #3
- PIC18F2220-ISO PDF datasheet #4
- PIC18F2220-ISO PDF datasheet #5
- PIC18F2220-ISO PDF datasheet #6
- PIC18F2220-ISO PDF datasheet #7
- Current page: 140 of 394
- Download datasheet (7Mb)
PIC18F2220/2320/4220/4320
15.5
In Pulse Width Modulation (PWM) mode, the CCP1 pin
produces up to a 10-bit resolution PWM output. Since
the CCP1 pin is multiplexed with the PORTC data latch,
the TRISC<2> bit must be cleared to make the CCP1
pin an output.
Figure 15-3 shows a simplified block diagram of the
CCP module in PWM mode.
For a step-by-step procedure on how to set up the CCP
module for PWM operation, see Section 15.5.3
“Setup for PWM Operation”.
FIGURE 15-3:
A PWM output (Figure 15-4) has a time base (period)
and a time that the output is high (duty cycle). The
frequency of the PWM is the inverse of the period
(1/period).
FIGURE 15-4:
DS39599G-page 138
Note: 8-bit timer is concatenated with 2-bit internal Q clock or
CCPR1H (Slave)
Note:
Duty Cycle Registers
Comparator
CCPR1L
TMR2
TMR2 = PR2
PR2
2 bits of the prescaler to create 10-bit time base.
Comparator
PWM Mode
Duty Cycle
Clearing the CCP1CON register will force
the CCP1 PWM output latch to the default
low level. This is not the PORTC I/O data
latch.
(Note 1)
Period
Clear Timer,
CCP1 pin and
latch D.C.
TMR2 = Duty Cycle
SIMPLIFIED PWM BLOCK
DIAGRAM
PWM OUTPUT
CCP1CON<5:4>
TMR2 = PR2
R
S
Q
TRISC<2>
RC2/CCP1/P1A
15.5.1
The PWM period is specified by writing to the PR2
register. The PWM period can be calculated using the
following equation.
EQUATION 15-1:
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
15.5.2
The PWM duty cycle is specified by writing to the
CCPR1L register and to the CCP1CON<5:4> bits. Up
to 10-bit resolution is available. The CCPR1L contains
the eight MSbs and the CCP1CON<5:4> contains the
two LSbs. This 10-bit value is represented by
CCPR1L:CCP1CON<5:4>. The PWM duty cycle is
calculated by the following equation.
EQUATION 15-2:
CCPR1L and CCP1CON<5:4> can be written to at any
time but the duty cycle value is not copied into
CCPR1H until a match between PR2 and TMR2 occurs
(i.e., the period is complete). In PWM mode, CCPR1H
is a read-only register.
CCP1 pin will not be set)
CCPR1H
Note:
PWM Duty Cycle = (CCPR1L:CCP1CON<5:4>) •
PWM Period = [(PR2) + 1] • 4 • T
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.
PWM DUTY CYCLE
© 2007 Microchip Technology Inc.
T
(TMR2 Prescale Value)
OSC
• (TMR2 Prescale Value)
OSC
•
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