PIC16F684-E/SL Microchip Technology, PIC16F684-E/SL Datasheet - Page 82
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PIC16F684-E/SL
Manufacturer Part Number
PIC16F684-E/SL
Description
IC PIC MCU FLASH 2KX14 14SOIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16F684-ISL.pdf
(4 pages)
4.PIC16F684-ISL.pdf
(192 pages)
5.PIC16F684-ISL.pdf
(6 pages)
6.PIC16F684-IST.pdf
(164 pages)
Specifications of PIC16F684-E/SL
Program Memory Type
FLASH
Program Memory Size
3.5KB (2K x 14)
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
12
Eeprom Size
256 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Processor Series
PIC16F
Core
PIC
Data Bus Width
8 bit
Data Ram Size
128 B
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
12
Number Of Timers
3
Operating Supply Voltage
2 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
52715-96, 52716-328, 52717-734
Development Tools By Supplier
PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
Minimum Operating Temperature
- 40 C
On-chip Adc
8-ch x 10-bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Connectivity
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
PIC16F684
11.1
In Capture mode, CCPR1H:CCPR1L captures the
16-bit value of the TMR1 register when an event occurs
on pin CCP1. An event is defined as one of the
following and is configured by the CCP1M<3:0> bits of
the CCP1CON 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
CCP1IF of the PIR1 register is set. The interrupt flag
must be cleared in software. If another capture occurs
before the value in the CCPR1H, CCPR1L register pair
is read, the old captured value is overwritten by the new
captured value (see Figure 11-1).
11.1.1
In Capture mode, the CCP1 pin should be configured
as an input by setting the associated TRIS control bit.
FIGURE 11-1:
DS41202F-page 80
CCP1
pin
Note:
System Clock (F
Capture Mode
Edge Detect
CCP1 PIN CONFIGURATION
If the CCP1 pin is configured as an output,
a write to the port can cause a capture
condition.
Prescaler
÷ 1, 4, 16
and
CCP1CON<3:0>
OSC
)
Set Flag bit CCP1IF
(PIR1 register)
CAPTURE MODE
OPERATION BLOCK
DIAGRAM
Capture
Enable
CCPR1H
TMR1H
CCPR1L
TMR1L
11.1.2
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.
11.1.3
When the Capture mode is changed, a false capture
interrupt may be generated. The user should keep the
CCP1IE interrupt enable bit of the PIE1 register clear to
avoid false interrupts. Additionally, the user should
clear the CCP1IF interrupt flag bit of the PIR1 register
following any change in operating mode.
11.1.4
There are four prescaler settings specified by the
CCP1M<3:0>
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 CCP1CON register before changing the
prescaler (see Example 11-1).
EXAMPLE 11-1:
BANKSEL CCP1CON
CLRF
MOVLW
MOVWF
CCP1CON
NEW_CAPT_PS ;Load the W reg with
CCP1CON
TIMER1 MODE SELECTION
SOFTWARE INTERRUPT
CCP PRESCALER
bits
of
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
© 2007 Microchip Technology Inc.
the
CCP1CON
register.