AC164112 Microchip Technology, AC164112 Datasheet - Page 141
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AC164112
Manufacturer Part Number
AC164112
Description
VOLTAGE LIMITER MPLAB ICD2 VPP
Manufacturer
Microchip Technology
Datasheet
1.AC164112.pdf
(302 pages)
Specifications of AC164112
Accessory Type
Voltage Limiter
Product
Cable Assemblies
Features
Programming And Debugging The Latest PIC12/PIC16/PIC18 Products
Development Tool Type
Hardware - Eval/Demo Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
MPLAB®
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With
MPLAB ICD 2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
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Part Number
Manufacturer
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Part Number:
AC164112
Manufacturer:
Microchip Technology
Quantity:
135
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15.3
The PWM mode generates a Pulse-Width Modulated
signal on the CCPx pin. The duty cycle, period and
resolution are determined by the following registers:
• PR2
• T2CON
• CCPRxL
• CCPxCON
In Pulse-Width Modulation (PWM) mode, the CCP
module produces up to a 10-bit resolution PWM output
on the CCPx pin.
Figure 15-3 shows a simplified block diagram of PWM
operation.
Figure 15-4 shows a typical waveform of the PWM
signal.
For a step-by-step procedure on how to set up the CCP
module for PWM operation, refer to Section 15.3.8
“Setup for PWM Operation”.
FIGURE 15-3:
© 2009 Microchip Technology Inc.
Note 1:
CCPRxH
Duty Cycle Registers
Comparator
2:
CCPRxL
PWM Mode
PR2
TMR2
Comparator
The 8-bit timer TMR2 register is concatenated
with the 2-bit internal system clock (F
2 bits of the prescaler, to create the 10-bit time
base.
In PWM mode, CCPRxH is a read-only register.
(2)
(Slave)
(1)
SIMPLIFIED PWM BLOCK
DIAGRAM
Clear Timer2,
toggle CCPx pin and
latch duty cycle
CCPxCON<5:4>
S
R
Q
TRIS
OSC
CCPx
), or
PIC16F72X/PIC16LF72X
The PWM output (Figure 15-4) has a time base
(period) and a time that the output stays high (duty
cycle).
FIGURE 15-4:
15.3.1
In PWM mode, the CCPx pin is multiplexed with the
PORT data latch. The user must configure the CCPx
pin as an output by clearing the associated TRIS bit.
Either RC1 or RB3 can be selected as the CCP2 pin.
Refer to Section 6.1 “Alternate Pin Function” for
more information.
Note:
Pulse Width
TMR2 = 0
CCPX PIN CONFIGURATION
Clearing the CCPxCON register will
relinquish CCPx control of the CCPx pin.
Period
CCP PWM OUTPUT
TMR2 = CCPRxL:CCPxCON<5:4>
TMR2 = PR2
DS41341E-page 141
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