PIC16F721-E/ML Microchip Technology, PIC16F721-E/ML Datasheet - Page 112

• Manufacturer Part Number: PIC16F721-E/ML
• Description: 7 KB FLASH, 256 B SRAM, 18 I/O 20 QFN 4x4mm TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F721-E/ML

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC16F/LF720/721
15.2
In Compare mode, the 16-bit CCPR1 register value is
constantly compared against the TMR1 register pair
value. When a match occurs, the CCP1 module may:
• Toggle the CCP1 output
• Set the CCP1 output
• Clear the CCP1 output
• Generate a Special Event Trigger
• Generate a Software Interrupt
The action on the pin is based on the value of the
CCP1M<3:0> control bits of the CCP1CON register.
All Compare modes can generate an interrupt.
FIGURE 15-2:
15.2.1
The user must configure the CCP1 pin as an output by
clearing the associated TRIS bit.
DS41430A-page 112
Note:
CCP1
Special Event Trigger will:
• Clear TMR1H and TMR1L registers.
• NOT set interrupt flag bit TMR1IF of the PIR1 register.
• Set the GO/DONE bit to start the ADC conversion.
Output Enable
TRIS
Compare Mode
CCP1 PIN CONFIGURATION
Clearing the CCP1CON register will force
the CCP1 compare output latch to the
default low level. This is not the PORT I/O
data latch.
Q
Special Event Trigger
CCP1CON<3:0>
R
S
Mode Select
Output
COMPARE MODE
OPERATION BLOCK
DIAGRAM
Logic
Set CCP1IF Interrupt Flag
4
(PIR1)
Match
CCPR1H CCPR1L
TMR1H
Comparator
TMR1L
15.2.2
In Compare mode, Timer1 must be running in either
Timer mode or Synchronized Counter mode. The
compare operation may not work in Asynchronous
Counter mode.
15.2.3
When
(CCP1M<3:0> = 1010), the CCP1IF bit in the PIR1
register is set and the CCP1 module does not assert
control of the CCP1 pin (refer to the CCP1CON
register).
15.2.4
When Special Event Trigger mode is chosen
(CCP1M<3:0> = 1011), the CCP1 module does the
following:
• Resets Timer1
• Starts an ADC conversion if ADC is enabled
The CCP1 module does not assert control of the CCP1
pin in this mode (refer to the CCP1CON register).
The Special Event Trigger output of the CCP occurs
immediately upon a match between the TMR1H,
TMR1L register pair and the CCPR1H, CCPR1L
register pair. The TMR1H, TMR1L register pair is not
reset until the next rising edge of the Timer1 clock. This
allows the CCPR1H, CCPR1L register pair to
effectively provide a 16-bit programmable period
register for Timer1.
15.2.5
The Compare mode is dependent upon the system
clock (F
down during Sleep mode, the Compare mode will not
function properly during Sleep.
Note:
Note 1: The Special Event Trigger from the CCP
OSC
2: Removing
Software
TIMER1 MODE SELECTION
Clocking Timer1 from the system clock
(F
mode. For the Compare operation of the
TMR1 register to the CCPR1 register to
occur, Timer1 must be clocked from the
instruction clock (F
external clock source.
SOFTWARE INTERRUPT MODE
SPECIAL EVENT TRIGGER
COMPARE DURING SLEEP
) for proper operation. Since F
module does not set interrupt flag bit
TMR1IF of the PIR1 register.
changing the contents of the CCPR1H
and CCPR1L register pair, between the
clock edge that generates the Special
Event Trigger and the clock edge that
generates
preclude the Reset from occurring.
OSC
) should not be used in Compare
Interrupt
 2010 Microchip Technology Inc.
the
the
match
Timer1
OSC
mode
/4) or from an
condition
Reset,
is
OSC
chosen
is shut
will
by