PIC18F65K22-I/MRRSL Microchip Technology, PIC18F65K22-I/MRRSL Datasheet - Page 253

• Manufacturer Part Number: PIC18F65K22-I/MRRSL
• Description: MCU PIC 32K FLASH MEM XLP 64QFN
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F65K22-I/MRRSL

• Core Size: 8-Bit
• Program Memory Size: 32KB (16K x 16)
• Core Processor: PIC
• Speed: 64MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 16x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN, Exposed Pad
• Controller Family/series: PIC18
• No. Of I/o's: 53
• Eeprom Memory Size: 1KB
• Ram Memory Size: 2KB
• Cpu Speed: 64MHz
• No. Of Timers: 8
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 64 MHz
• Number Of Programmable I/os: 53
• Number Of Timers: 8
• Operating Supply Voltage: 1.8 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 16 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19.4
In Pulse-Width Modulation (PWM) mode, the CCP4 pin
produces up to a 10-bit resolution PWM output. Since
the CCP4 pin is multiplexed with a PORTC or PORTE
data latch, the appropriate TRIS bit must be cleared to
make the CCP4 pin an output.
Figure 19-3 shows a simplified block diagram of the
ECCP1 module in PWM mode.
For a step-by-step procedure on how to set up the CCP
module for PWM operation, see Section 19.4.3
“Setup for PWM Operation”.
FIGURE 19-3:
 2010 Microchip Technology Inc.
Note 1:
2:
Note:
CCPR4H (Slave)
Duty Cycle Registers
Comparator
CCPR4L
TMR2
PR2
Comparator
PWM Mode
The 8-bit TMR2 value is concatenated with the 2-bit
internal Q clock, or 2 bits of the prescaler, to create
the 10-bit time base.
CCP4 and its appropriate timers are used as an
example. For details on all of the CCP modules and
their timer assignments, see Table 19-2 and
Table 19-3.
Clearing the CCP4CON register will force
the RC1 or RE7 output latch (depending
on device configuration) to the default low
level. This is not the PORTC or PORTE
I/O data latch.
(Note 1)
Clear Timer,
ECCP1 Pin and
Latch D.C.
SIMPLIFIED PWM BLOCK
DIAGRAM
CCP4CON<5:4>
R
S
Q
TRISC<2>
RC2/ECCP1
Preliminary
PIC18F87K22 FAMILY
A PWM output (Figure 19-4) has a time base (period)
and a time that the output stays high (duty cycle). The
frequency of the PWM is the inverse of the period
(1/period).
FIGURE 19-4:
19.4.1
The PWM period is specified by writing to the PR2
register. The PWM period can be calculated using the
following formula:
EQUATION 19-1:
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 CCP4 pin is set
• The PWM duty cycle is latched from CCPR4L into
(An exception: If PWM duty cycle = 0%, the CCP4
pin will not be set)
CCPR4H
Note:
PWM Period = [(PR2) + 1] • 4 • T
TMR2 = PR2
Duty Cycle
PWM PERIOD
The Timer2 postscalers (see Section 15.0
“Timer2 Module”) are 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.
Period
TMR2 = Duty Cycle
(TMR2 Prescale Value)
PWM OUTPUT
TMR2 = PR2
DS39960B-page 253
OSC
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