PIC18F2510-I/ML Microchip Technology Inc., PIC18F2510-I/ML Datasheet - Page 131
PIC18F2510-I/ML
Manufacturer Part Number
PIC18F2510-I/ML
Description
Microcontroller; 32 KB Flash; 1024 RAM; 0 EEPROM; 21 I/O; 28-Pin-QFN
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F2510-IML.pdf
(359 pages)
Specifications of PIC18F2510-I/ML
A/d Inputs
10-Channel, 10-Bit
Comparators
2
Cpu Speed
10 MIPS
Eeprom Memory
0 Bytes
Input Output
21
Interface
I2C/SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
28-pin QFN
Programmable Memory
32K Bytes
Ram Size
1.5K Bytes
Speed
40 MHz
Timers
1-8-bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F2510-I/ML
Manufacturer:
MICORCHIP
Quantity:
662
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The CCPRxH register and a 2-bit internal latch are
used to double-buffer the PWM duty cycle. This
double-buffering is essential for glitchless PWM
operation.
When the CCPRxH and 2-bit latch match TMR2,
concatenated with an internal 2-bit Q clock or 2 bits of
the TMR2 prescaler, the CCPx pin is cleared.
The maximum PWM resolution (bits) for a given PWM
frequency is given by the equation:
TABLE 13-4:
13.4.3
The PWM auto-shutdown features of the Enhanced CCP
module are also available to CCP1 in 28-pin devices. The
operation of this feature is discussed in detail in
Section 14.4.7 “Enhanced PWM Auto-Shutdown”.
Auto-shutdown features are not available for CCP2.
© 2006 Microchip Technology Inc.
Timer Prescaler (1, 4, 16)
PR2 Value
Maximum Resolution (bits)
PWM Frequency
PWM AUTO-SHUTDOWN
(CCP1 ONLY)
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 40 MHz
2.44 kHz
FFh
16
10
9.77 kHz
Preliminary
FFh
10
4
PIC18F45J10 FAMILY
39.06 kHz
EQUATION 13-3:
13.4.4
The following steps should be taken when configuring
the CCP module for PWM operation:
1.
2.
3.
4.
5.
Note:
FFh
10
1
Set the PWM period by writing to the PR2
register.
Set the PWM duty cycle by writing to the
CCPRxL register and CCPxCON<5:4> bits.
Make the CCPx pin an output by clearing the
appropriate TRIS bit.
Set the TMR2 prescale value, then enable
Timer2 by writing to T2CON.
Configure the CCPx module for PWM operation.
PWM Resolution (max)
If the PWM duty cycle value is longer than
the PWM period, the CCP2 pin will not be
cleared.
SETUP FOR PWM OPERATION
156.25 kHz
3Fh
1
8
312.50 kHz
=
1Fh
1
7
log
-----------------------------bits
log
DS39682B-page 129
⎛
⎝
---------------
F
F
PWM
2 ( )
OSC
416.67 kHz
⎞
⎠
6.58
17h
1
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