PIC16F716-I/SS Microchip Technology Inc., PIC16F716-I/SS Datasheet - Page 54

• Manufacturer Part Number: PIC16F716-I/SS
• Description: MCU, 8-Bit, 2KW Flash, 128 RAM, 13 I/O, SSOP-20
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F716-I/SS

• A/d Inputs: 4-Channel, 8-Bit
• Cpu Speed: 5 MIPS
• Eeprom Memory: 0 Bytes
• Input Output: 13
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 20-pin SSOP
• Programmable Memory: 3.5K Bytes
• Ram Size: 128 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC16F716
8.3
The PWM mode generates a Pulse-Width Modulated
signal on the CCP1 pin. The duty cycle, period and
resolution are determined by the following registers:
• PR2
• T2CON
• CCPR1L
• CCP1CON
In Pulse-Width Modulation (PWM) mode, the CCP
module produces up to a 10-bit resolution PWM output
on the CCP1 pin. Since the CCP1 pin is multiplexed
with the PORT data latch, the TRIS for that pin must be
cleared to enable the CCP1 pin output driver.
Figure 8-3 shows a simplified block diagram of PWM
operation.
Figure 8-4 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, see Section 8.3.7 “Setup
for PWM Operation”.
FIGURE 8-3:
DS41206B-page 52
Note 1:
Note:
CCPR1H
Duty Cycle Registers
Comparator
2:
CCPR1L
PWM Mode
PR2
TMR2
Comparator
Clearing the CCP1CON register will
relinquish CCP1 control of the CCP1 pin.
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, CCPR1H is a read-only register.
(2)
(Slave)
(1)
SIMPLIFIED PWM BLOCK
DIAGRAM
Clear Timer2,
toggle CCP1 pin and
latch duty cycle
CCP1CON<5:4>
S
R
Q
TRIS
OSC
CCP1
), or
The PWM output (Figure 8-4) has a time base
(period) and a time that the output stays high (duty
cycle).
FIGURE 8-4:
Pulse Width
TMR2 = 0
Period
CCP PWM OUTPUT
TMR2 = CCPR1L:CCP1CON<5:4>
© 2007 Microchip Technology Inc.
TMR2 = PR2