PIC16F677-I/P Microchip Technology, PIC16F677-I/P Datasheet - Page 134

• Manufacturer Part Number: PIC16F677-I/P
• Description: IC PIC MCU FLASH 2KX14 20DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F677-I/P

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mfg Application Notes: Intro to Capacitive Sensing Appl Notes Layout and Physical Design Appl Note
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 18
• Eeprom Size: 256 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Interface Type: SSP
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 2
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162061 - HEADER INTRFC MPLAB ICD2 20PINACICE0203 - MPLABICE 20P 300 MIL ADAPTER
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIC16F631/677/685/687/689/690
11.3.4
In Sleep mode, the TMR2 register will not increment
and the state of the module will not change. If the CCP1
pin is driving a value, it will continue to drive that value.
When the device wakes up, TMR2 will continue from its
previous state.
11.3.5
The PWM frequency is derived from the system clock
frequency. Any changes in the system clock frequency
will result in changes to the PWM frequency. See
Section 3.0 “Oscillator Module (With Fail-Safe
Clock Monitor)” for additional details.
11.3.6
Any Reset will force all ports to Input mode and the
CCP registers to their Reset states.
11.3.7
The following steps should be taken when configuring
the CCP module for PWM operation:
1.
2.
3.
4.
5.
6.
DS41262C-page 132
Disable the PWM pin (CCP1) output driver by
setting the associated TRIS bit.
Set the PWM period by loading the PR2 register.
Configure the CCP module for the PWM mode
by loading the CCP1CON register with the
appropriate values.
Set the PWM duty cycle by loading the CCPR1L
register and DC1B<1:0> bits of the CCP1CON
register.
Configure and start Timer2:
• Clear the TMR2IF interrupt flag bit of the
• Set the Timer2 prescale value by loading the
• Enable Timer2 by setting the TMR2ON bit of
Enable PWM output after a new PWM cycle has
started:
• Wait until Timer2 overflows (TMR2IF bit of
• Enable the CCP1 pin output driver by clearing
PIR1 register.
T2CKPS bits of the T2CON register.
the T2CON register.
the PIR1 register is set).
the associated TRIS bit.
OPERATION IN SLEEP MODE
CHANGES IN SYSTEM CLOCK
FREQUENCY
EFFECTS OF RESET
SETUP FOR PWM OPERATION
Preliminary
© 2006 Microchip Technology Inc.