PIC16F874A-E/L Microchip Technology, PIC16F874A-E/L Datasheet - Page 207
![IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,LDCC,44PIN,PLASTIC](/photos/6/63/66325/150-44-plcc_sml.jpg)
PIC16F874A-E/L
Manufacturer Part Number
PIC16F874A-E/L
Description
IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,LDCC,44PIN,PLASTIC
Manufacturer
Microchip Technology
Series
PIC® 16Fr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16F688T-ISL.pdf
(688 pages)
3.PIC16C770-ISO.pdf
(8 pages)
4.PIC16F873A-ISO.pdf
(234 pages)
5.PIC16F873A-ISO.pdf
(6 pages)
6.PIC16F873A-ISO.pdf
(4 pages)
7.PIC16F873A-ISO.pdf
(6 pages)
8.PIC16F873A-ISO.pdf
(4 pages)
9.PIC16F873A-ISO.pdf
(22 pages)
Specifications of PIC16F874A-E/L
Rohs Compliant
YES
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
33
Program Memory Size
7KB (4K x 14)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
192 x 8
Voltage - Supply (vcc/vdd)
4 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
DVA16XL441 - ADAPTER DEVICE ICE 44PLCC309-1040 - ADAPTER 44-PLCC ZIF TO 40-DIP309-1039 - ADAPTER 44-PLCC TO 40-DIP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC16F874A-E/L
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16F688T-ISL PDF datasheet #2
- PIC16C770-ISO PDF datasheet #3
- PIC16F873A-ISO PDF datasheet #4
- PIC16F873A-ISO PDF datasheet #5
- PIC16F873A-ISO PDF datasheet #6
- PIC16F873A-ISO PDF datasheet #7
- PIC16F873A-ISO PDF datasheet #8
- PIC16F873A-ISO PDF datasheet #9
- Current page: 207 of 688
- Download datasheet (3Mb)
14.3.2
14.3.2.1
14.3.3
14.3.4
1997 Microchip Technology Inc.
Changing Between Capture Modes
CCP Prescaler
Sleep Operation
Effects of a Reset
When the Capture mode is changed, a capture interrupt may be generated. The user should
keep the CCPxIE bit clear to disable these interrupts and should clear the CCPxIF flag bit
following any such change in operating mode.
There are four prescaler settings, specified by bits CCPxM3:CCPxM0. Whenever the CCP mod-
ule 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 prescale setting to another may generate an interrupt. Also, the pres-
caler counter will not be cleared, therefore the first capture may be from a nonzero prescaler.
Example 14-1
This example also clears the prescaler counter and will not generate the interrupt.
Example 14-1:
To clear the Capture prescaler count, the CCP module must be configured into any non-capture
CCP mode (Compare, PWM, or CCP off modes).
When the device is placed in sleep, Timer1 will not increment (since it is in synchronous mode),
but the prescaler will continue to count events (not synchronized). When a specified capture
event occurs, the CCPxIF bit will be set, but the capture register will not be updated. If the CCP
interrupt is enabled, the device will wake-up from sleep. The value in the 16-bit TMR1 register is
not transferred to the 16-bit capture register, but since the timer was not incrementing, this value
should not have any meaning. Effectively, this allows the CCP pin to be used as another external
interrupt.
The CCP module is off, and the value in the capture prescaler is forced to 0.
CLRF
MOVLW
MOVWF
CCP1CON
NEW_CAPT_PS
CCP1CON
shows the recommended method for switching between capture prescale settings.
Changing Between Capture Prescalers
; Turn CCP module off
; Load the W reg with the new prescaler
;
; Load CCP1CON with this value
mode value and CCP ON
Section 14. CCP
DS31014A-page 14-5
14
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