PIC18F23K20-E/MLQTP MICROCHIP [Microchip Technology], PIC18F23K20-E/MLQTP Datasheet - Page 157
PIC18F23K20-E/MLQTP
Manufacturer Part Number
PIC18F23K20-E/MLQTP
Description
28/40/44-Pin Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F23K20-EMLQTP.pdf
(420 pages)
- Current page: 157 of 420
- Download datasheet (8Mb)
15.2
In Capture mode, the CCPRxH:CCPRxL register pair
captures the 16-bit value of the TMR1 or TMR3
registers when an event occurs on the corresponding
CCPx pin. An event is defined as one of the following:
• every falling edge
• every rising edge
• every 4th rising edge
• every 16th rising edge
The event is selected by the mode select bits,
CCPxM<3:0> of the CCPxCON register. When a cap-
ture is made, the interrupt request flag bit, CCPxIF, is
set; it must be cleared by software. If another capture
occurs before the value in register CCPRx is read, the
old captured value is overwritten by the new captured
value.
15.2.1
In Capture mode, the appropriate CCPx pin should be
configured as an input by setting the corresponding
TRIS direction bit.
15.2.2
The timers that are to be used with the capture feature
(Timer1 and/or Timer3) must be running in Timer mode or
Synchronized Counter mode. In Asynchronous Counter
mode, the capture operation may not work. The timer to
be used with each CCP module is selected in the T3CON
register (see Section 15.1.1 “CCP Modules and Timer
Resources”).
15.2.3
When the Capture mode is changed, a false capture
interrupt may be generated. The user should keep the
CCPxIE interrupt enable bit clear to avoid false inter-
rupts. The interrupt flag bit, CCPxIF, should also be
cleared following any such change in operating mode.
15.2.4
There are four prescaler settings in Capture mode; they
are specified as part of the operating mode selected by
the mode select bits (CCPxM<3:0>). Whenever the
CCP module is turned off or Capture mode is disabled,
the prescaler counter is cleared. This means that any
Reset will clear the prescaler counter.
Switching from one capture prescaler to another may
generate an interrupt. Also, the prescaler counter will
not be cleared; therefore, the first capture may be from
a non-zero prescaler. Example 15-1 shows the
recommended method for switching between capture
prescalers. This example also clears the prescaler
counter and will not generate the “false” interrupt.
© 2007 Microchip Technology Inc.
Note:
Capture Mode
CCP PIN CONFIGURATION
If the CCPx pin is configured as an output,
a write to the port can cause a capture
condition.
TIMER1/TIMER3 MODE SELECTION
SOFTWARE INTERRUPT
CCP PRESCALER
Advance Information
EXAMPLE 15-1:
PIC18F2XK20/4XK20
CLRF
MOVLW
MOVWF
CCP2CON
NEW_CAPT_PS ; Load WREG with the
CCP2CON
CHANGING BETWEEN
CAPTURE PRESCALERS
(CCP2 SHOWN)
; Turn CCP module off
; new prescaler mode
; value and CCP ON
; Load CCP2CON with
; this value
DS41303B-page 155
Related parts for PIC18F23K20-E/MLQTP
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC PIC MCU FLASH 4KX16 28-SSOP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC PIC MCU FLASH 4KX16 28-SOIC
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
IC MCU 8BIT 8KB FLASH 28UQFN
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC PIC MCU FLASH 4KX16 28-QFN
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
IC PIC MCU FLASH 4KX16 28-DIP
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
8 KB Enh Flash, 768 RAM, 25 I/O Pb Free, Nanowatt XLP 28 QFN 6x6mm TUBE
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
8 KB Enh Flash, 768 RAM, 25 I/O Pb Free, Nanowatt XLP 28 UQFN 4x4x0.5mm TUBE
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
8 KB Enh Flash, 768 RAM, 25 I/O Pb Free, Nanowatt XLP 28 SOIC .300in TUBE
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
8 KB Enh Flash, 768 RAM, 25 I/O Pb Free, Nanowatt XLP 28 SPDIP .300in TUBE
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
8 KB Enh Flash, 768 RAM, 25 I/O Pb Free, Nanowatt XLP 28 SSOP .209in TUBE
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet: