PIC16F684-E/P Microchip Technology, PIC16F684-E/P Datasheet - Page 89

• Manufacturer Part Number: PIC16F684-E/P
• Description: IC PIC MCU FLASH 2KX14 14DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F684-E/P

• Program Memory Type: FLASH
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 14-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Eeprom Size: 256 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 128 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 125 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: 8-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DM163029 - BOARD PICDEM FOR MECHATRONICSACICE0207 - MPLABICE 14P 300 MIL ADAPTER
• Connectivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

11.3.7.1
The auto-shutdown feature can be configured to allow
auto-restarts of the module following a shutdown event.
This is enabled by setting the PRSEN bit of the
PWM1CON register (PWM1CON<7>).
In Shutdown mode with PRSEN = 1 (Figure 11-12), the
ECCPASE bit will remain set for as long as the cause
of the shutdown continues. When the shutdown condi-
tion clears, the ECCPASE bit is cleared. If PRSEN = 0
(Figure 11-13), once a shutdown condition occurs, the
ECCPASE bit will remain set until it is cleared by firm-
ware. Once ECCPASE is cleared, the enhanced PWM
will resume at the beginning of the next PWM period.
Independent of the PRSEN bit setting, whether the
auto-shutdown source is one of the comparators or
INT, the shutdown condition is a level. The ECCPASE
bit cannot be cleared as long as the cause of the shut-
down persists.
The Auto-shutdown mode can be forced by writing a ‘1’
to the ECCPASE bit.
FIGURE 11-12:
FIGURE 11-13:
 2004 Microchip Technology Inc.
Note:
Shutdown
Shutdown
ECCPASE bit
PWM
ECCPASE bit
PWM
Writing to the ECCPASE bit is disabled
while a shutdown condition is active.
Auto-shutdown and Auto-restart
Activity
Activity
Event
Event
PWM Period
PWM Period
PWM AUTO-SHUTDOWN (PRSEN = 1, AUTO-RESTART ENABLED)
PWM AUTO-SHUTDOWN (PRSEN = 0, AUTO-RESTART DISABLED)
Start of
Start of
Normal PWM
Normal PWM
Preliminary
Event Occurs
Event Occurs
PWM Period
Shutdown
PWM Period
Shutdown
11.3.8
When the ECCP module is used in the PWM mode, the
application hardware must use the proper external
pull-up and/or pull-down resistors on the PWM output
pins. When the microcontroller is released from Reset,
all of the I/O pins are in the high-impedance state. The
external circuits must keep the power switch devices in
the off state, until the microcontroller drives the I/O pins
with the proper signal levels, or activates the PWM
output(s).
The CCP1M<1:0> bits (CCP1CON<1:0>) allow the
user to choose whether the PWM output signals are
active-high or active-low for each pair of PWM output
pins (P1A/P1C and P1B/P1D). The PWM output polar-
ities must be selected before the PWM pins are config-
ured as outputs. Changing the polarity configuration
while the PWM pins are configured as outputs is not
recommended since it may result in damage to the
application circuits.
The P1A, P1B, P1C and P1D output latches may not
be in the proper states when the PWM module is initial-
ized. Enabling the PWM pins for output at the same
time as the ECCP module may cause damage to the
application circuit. The ECCP module must be enabled
in the proper Output mode and complete a full PWM
cycle before configuring the PWM pins as outputs. The
completion of a full PWM cycle is indicated by the
TMR2IF bit being set as the second PWM period
begins.
Event Clears
Event Clears
Shutdown
Shutdown
START-UP CONSIDERATIONS
Cleared by
ECCPASE
Firmware
Resumes
Resumes
PIC16F684
PWM
PWM
DS41202C-page 87