PIC18F67J90-I/PT Microchip Technology, PIC18F67J90-I/PT Datasheet - Page 176

• Manufacturer Part Number: PIC18F67J90-I/PT
• Description: IC PIC MCU FLASH 128KB 64-TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F67J90-I/PT

• Core Size: 8-Bit
• Program Memory Size: 128KB (64K x 16)
• Core Processor: PIC
• Speed: 48MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, LVD, POR, PWM, WDT
• Number Of I /o: 51
• Program Memory Type: FLASH
• Ram Size: 3.8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Controller Family/series: PIC18
• No. Of I/o's: 51
• Ram Memory Size: 3.8310546875KB
• Cpu Speed: 48MHz
• No. Of Timers: 4
• No. Of Pwm Channels: 2
• Processor Series: PIC18F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 3923 B
• Interface Type: AUSART, EUSART, I2C, SPI
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 51
• Number Of Timers: 4
• Operating Supply Voltage: 2.65 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162079 - HEADER MPLAB ICD2 18F85J90 64/80AC164328 - MODULE SKT FOR 80TQFP
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

PIC18F87J90 FAMILY
16.2
In Capture mode, the CCPR2H:CCPR2L register pair
captures the 16-bit value of the TMR1 or TMR3 register
when an event occurs on the CCP2 pin (RC1 or RE7,
depending on device configuration). 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,
CCP2M<3:0> (CCP2CON<3:0>). When a capture is
made, the interrupt request flag bit, CCP2IF (PIR3<2>), is
set; it must be cleared in software. If another capture
occurs before the value in register, CCPR2, is read, the old
captured value is overwritten by the new captured value.
16.2.1
In Capture mode, the appropriate CCPx pin should be
configured as an input by setting the corresponding
TRIS direction bit.
16.2.2
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 16.1.1 “CCP Modules and Timer
Resources”).
FIGURE 16-2:
DS39933D-page 176
Note:
Capture Mode
CCP PIN CONFIGURATION
If RC1/CCP2 or RE7/CCP2 is configured
as an output, a write to the port can cause
a capture condition.
TIMER1/TIMER3 MODE SELECTION
CCP1 Pin
CCP2 Pin
CAPTURE MODE OPERATION BLOCK DIAGRAM
CCP1CON<3:0>
CCP2CON<3:0>
Prescaler
 1, 4, 16
Prescaler
 1, 4, 16
Q1:Q4
4
Edge Detect
Edge Detect
4
4
and
and
Set CCP2IF
Set CCP1IF
T3CCP1
T3CCP2
T3CCP2
T3CCP1
T3CCP2
T3CCP2
16.2.3
When the Capture mode is changed, a false capture
interrupt may be generated. The user should keep the
CCP2IE bit (PIE3<2>) clear to avoid false interrupts
and should clear the flag bit, CCP2IF, following any
such change in operating mode.
16.2.4
There are four prescaler settings in Capture mode.
They are specified as part of the operating mode
selected by the mode select bits (CCP2M<3:0>).
Whenever the CCP module is turned off, or the CCP
module is not in Capture mode, 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 16-1 shows the
recommended method for switching between capture
prescalers. This example also clears the prescaler
counter and will not generate the “false” interrupt.
EXAMPLE 16-1:
CLRF
MOVLW NEW_CAPT_PS ; Load WREG with the
MOVWF CCP2CON
CCP2CON
SOFTWARE INTERRUPT
CCP PRESCALER
TMR3
Enable
TMR1
Enable
TMR3
Enable
TMR1
Enable
CCPR1H
CCPR2H
TMR1H
TMR3H
TMR3H
TMR1H
CHANGING BETWEEN
CAPTURE PRESCALERS
; Turn CCP module off
; new prescaler mode
; value and CCP ON
; Load CCP2CON with
; this value
 2010 Microchip Technology Inc.
CCPR1L
CCPR2L
TMR1L
TMR3L
TMR3L
TMR1L