PIC18F8720-I/PT Microchip Technology, PIC18F8720-I/PT Datasheet - Page 153

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PIC18F8720-I/PT

Manufacturer Part Number
PIC18F8720-I/PT
Description
IC MCU FLASH 64KX16 EE 80TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Fr

Specifications of PIC18F8720-I/PT

Program Memory Type
FLASH
Program Memory Size
128KB (64K x 16)
Package / Case
80-TFQFP
Core Processor
PIC
Core Size
8-Bit
Speed
25MHz
Connectivity
EBI/EMI, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
68
Eeprom Size
1K x 8
Ram Size
3.75K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 16x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Processor Series
PIC18F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
3.75 KB
Interface Type
I2C/SPI/USART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
68
Number Of Timers
5
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734, 52712-325, EWPIC18
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, ICE4000, DM183032, DM183022, DV164136
Minimum Operating Temperature
- 40 C
On-chip Adc
16-ch x 10-bit
Package
80TQFP
Device Core
PIC
Family Name
PIC18
Maximum Speed
25 MHz
Operating Supply Voltage
5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPAC164320 - MODULE SKT MPLAB PM3 80TQFPAC174011 - MODULE SKT PROMATEII 80TQFP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant

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16.2
In Capture mode, CCPR1H:CCPR1L captures the 16-bit
value of the TMR1 or TMR3 registers when an event
occurs on pin RC2/CCP1. 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 control bits, CCP1M3:CCP1M0
(CCP1CON<3:0>). When a capture is made, the inter-
rupt request flag bit, CCP1IF (PIR1<2>), is set; it must
be cleared in software. If another capture occurs before
the value in register CCPR1 is read, the old captured
value is overwritten by the new captured value.
16.2.1
In Capture mode, the RC2/CCP1 pin should be
configured as an input by setting the TRISC<2> 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:
 2004 Microchip Technology Inc.
Note:
Capture Mode
CCP1 pin
CCP PIN CONFIGURATION
If the RC2/CCP1 is configured as an out-
put, a write to the port can cause a capture
condition.
TIMER1/TIMER3 MODE SELECTION
PIC18F6520/8520/6620/8620/6720/8720
CAPTURE MODE OPERATION BLOCK DIAGRAM
Q’s
Edge Detect
Prescaler
1, 4, 16
and
CCP1CON<3:0>
Set Flag bit CCP1IF
T3CCP2
T3CCP2
16.2.3
When the Capture mode is changed, a false capture
interrupt may be generated. The user should keep bit
CCP1IE (PIE1<2>) clear to avoid false interrupts and
should clear the flag bit, CCP1IF, following any such
change in operating mode.
16.2.4
There are four prescaler settings, specified by bits
CCP1M3:CCP1M0. 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
MOVWF
CCP1CON, F
NEW_CAPT_PS ; Load WREG with the
CCP1CON
SOFTWARE INTERRUPT
CCP PRESCALER
TMR1
Enable
TMR3
Enable
CCPR1H
TMR1H
TMR3H
CHANGING BETWEEN
CAPTURE PRESCALERS
; Turn CCP module off
; new prescaler mode
; value and CCP ON
; Load CCP1CON with
; this value
CCPR1L
TMR3L
TMR1L
DS39609B-page 151

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