PIC16F1827-E/P Microchip Technology, PIC16F1827-E/P Datasheet - Page 207

• Manufacturer Part Number: PIC16F1827-E/P
• Description: MCU PIC 8BIT 4K FLASH 18-DIP
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F1827-E/P

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 32MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 18-DIP (0.300", 7.62mm)
• Controller Family/series: PIC16F
• No. Of I/o's: 16
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 384Byte
• Cpu Speed: 32MHz
• No. Of Timers: 5
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 384 B
• Interface Type: I2C, EUSART (SCI), SPI, USB
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 4 x 8 bit, 1 x 16 bit
• Operating Supply Voltage: 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
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• On-chip Dac: 5 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

23.3
In Capture mode, the CCPRxH, CCPRxL register pair
captures the 16-bit value of the TMR1 register when an
event occurs on pin CCPx. An event is defined as one
of the following and is configured by the CCPxM<3:0>
bits of the CCPxCON register:
• Every falling edge
• Every rising edge
• Every 4th rising edge
• Every 16th rising edge
When a capture is made, the Interrupt Request Flag bit
CCPxIF of the PIRx register is set. The interrupt flag
must be cleared in software. If another capture occurs
before the value in the CCPRxH, CCPRxL register pair
is read, the old captured value is overwritten by the new
captured value (see Figure 23-1).
23.3.1
In Capture mode, the CCPx pin should be configured
as an input by setting the associated TRIS control bit.
Also, the CCPx pin function can be moved to
alternative pins using the APFCON register. Refer to
Section 12.1 “Alternate Pin Function” for more
details.
FIGURE 23-1:
© 2009 Microchip Technology Inc.
CCPx
pin
Note:
System Clock (F
Capture Mode
Edge Detect
CCPX PIN CONFIGURATION
If the CCPx pin is configured as an output,
a write to the port can cause a capture
condition.
Prescaler
÷ 1, 4, 16
and
CCPxCON<3:0>
OSC
)
Set Flag bit CCPxIF
(PIRx register)
CAPTURE MODE
OPERATION BLOCK
DIAGRAM
Capture
Enable
CCPRxH
TMR1H
CCPRxL
TMR1L
Preliminary
23.3.2
Timer1 must be running in Timer mode or Synchronized
Counter mode for the CCP module to use the capture
feature. In Asynchronous Counter mode, the capture
operation may not work.
23.3.3
When the Capture mode is changed, a false capture
interrupt may be generated. The user should keep the
CCPxIE interrupt enable bit of the PIEx register clear to
avoid false interrupts. Additionally, the user should
clear the CCPxIF interrupt flag bit of the PIRx register
following any change in Operating mode.
23.3.4
There are four prescaler settings specified by the
CCPxM<3:0> bits of the CCPxCON register. Whenever
the CCP module is turned off, or the CCP module is not
in Capture mode, the prescaler counter is cleared. Any
Reset will clear the prescaler counter.
Switching from one capture prescaler to another does not
clear the prescaler and may generate a false interrupt. To
avoid this unexpected operation, turn the module off by
clearing the CCPxCON register before changing the
prescaler (see Example 23-1).
EXAMPLE 23-1:
23.3.5
Capture mode depends upon the Timer1 module for
proper operation. There are two options for driving the
Timer1 module in Capture mode. It can be driven by the
instruction clock (F
If Timer1 is clocked by F
increment during Sleep. When the device wakes from
Sleep, Timer1 will continue from its previous state.
If Timer1 is clocked by an external clock source, then
Capture mode will operate as defined in Section 23.1
“Capture/Compare/PWM”.
BANKSEL CCP1CON
CLRF
MOVLW
MOVWF
Note:
PIC16F/LF1826/27
CCP1CON
NEW_CAPT_PS ;Load the W reg with
CCP1CON
TIMER1 MODE SELECTION
SOFTWARE INTERRUPT MODE
Clocking Timer1 from the system clock
(F
mode. In order for Capture mode to
recognize the trigger event on the CCPx
pin, TImer1 must be clocked from the
instruction clock (F
external clock source.
CCP PRESCALER
CAPTURE DURING SLEEP
OSC
) should not be used in Capture
OSC
/4), or by an external clock source.
CHANGING BETWEEN
CAPTURE PRESCALERS
;Set Bank bits to point
;to CCP1CON
;Turn CCP module off
;the new prescaler
;move value and CCP ON
;Load CCP1CON with this
;value
OSC
/4, then Timer1 will not
OSC
DS41391B-page 207
/4) or from an