PIC16F1526T-I/PT Microchip Technology, PIC16F1526T-I/PT Datasheet - Page 193

• Manufacturer Part Number: PIC16F1526T-I/PT
• Description: 64-pin, 14KB Flash, 768B RAM, 10-bit ADC, 10xCCP, 2xSPI, 2xMI2C, 2xEUSART, 2.3V-
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1526T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 2.3 V ~ 5.5 V
• Data Converters: A/D 30x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

20.3.2
The following steps should be taken when configuring
the CCP module for standard PWM operation:
1.
2.
3.
4.
5.
6.
20.3.3
The PWM standard mode makes use of one of the 8-bit
Timer2/4/6/8/10 timer resources to specify the PWM
period.
Configuring the CxTSEL<1:0> bits in the CCPTMRSx
register selects which Timer2/4/6/8/10 timer is used.
See
resources.
 2011 Microchip Technology Inc.
Note:
Disable the CCPx pin output driver by setting the
associated TRIS bit.
Load the PRx register with the PWM period
value.
Configure the CCP module for the PWM mode
by loading the CCPxCON register with the
appropriate values.
Load the CCPRxL register and the DCxBx bits
of the CCPxCON register, with the PWM duty
cycle value.
Configure and start Timer2/4/6/8/10:
• Select the Timer2/4/6/8/10 resource to be
• Clear the TMRxIF interrupt flag bit of the
• Configure the TxCKPS bits of the TxCON
• Enable the Timer by setting the TMRxON
Enable PWM output pin:
• Wait until the Timer overflows and the
• Enable the CCPx pin output driver by clear-
Table 20-6
used for PWM generation by setting the
CxTSEL<1:0> bits in the CCPTMRSx
register.
PIRx register. See Note below.
register with the Timer prescale value.
bit of the TxCON register.
TMRxIF bit of the PIRx register is set. See
Note below.
ing the associated TRIS bit.
SETUP FOR PWM OPERATION
In order to send a complete duty cycle and
period on the first PWM output, the above
steps must be included in the setup
sequence. If it is not critical to start with a
complete PWM signal on the first output,
then step 6 may be ignored.
TIMER2/4/6/8/10 TIMER RESOURCE
for CCPx PWM Timer2/4/6/8/10
Preliminary
20.3.4
The PWM period is specified by the PRx register of
Timer2/4/6/8/10. The PWM period can be calculated
using the formula of
EQUATION 20-1:
When TMRx is equal to PRx, the following three events
occur on the next increment cycle:
• TMRx is cleared
• The CCPx pin is set. (Exception: If the PWM duty
• The PWM duty cycle is latched from CCPRxL into
cycle = 0%, the pin will not be set.)
CCPRxH.
Note:
Note 1:
PWM Period
PIC16(L)F1526/27
PWM PERIOD
The Timer postscaler (see
“Timer2/4/6/8/10 Operation”
in
frequency.
the
T
OSC
=
Equation
(TMRx Prescale Value)
determination

PWM PERIOD
= 1/F

PRx
OSC

+
20-1.
1
 4 T

DS41458B-page 193

of
Section 19.1
OSC
is not used
the

PWM