參數(shù)資料
型號： PIC16C77-04/L
廠商： Microchip Technology
文件頁數(shù)： 86/114頁
文件大?。?/td> 0K
描述： IC MCU OTP 8KX14 A/D PWM 44PLCC
產(chǎn)品培訓(xùn)模塊： Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標準包裝： 27
系列： PIC® 16C
核心處理器： PIC
芯體尺寸： 8-位
速度： 4MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 33
程序存儲器容量： 14KB（8K x 14）
程序存儲器類型： OTP
RAM 容量： 368 x 8
電壓 - 電源 (Vcc/Vdd)： 4 V ~ 6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x8b
振蕩器型： 外部
工作溫度： 0°C ~ 70°C
封裝/外殼： 44-LCC（J 形引線）
包裝： 管件
配用： AC164309-ND - MODULE SKT FOR PM3 44PLCC
444-1001-ND - DEMO BOARD FOR PICMICRO MCU
309-1040-ND - ADAPTER 44-PLCC ZIF TO 40-DIP
309-1039-ND - ADAPTER 44-PLCC TO 40-DIP
1997 Microchip Technology Inc.
DS30390E-page 73
PIC16C7X
10.1.4
CCP PRESCALER
There are four prescaler settings, specied 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 rst capture may be from
a non-zero prescaler. Example 10-1 shows the recom-
mended method for switching between capture pres-
calers. This example also clears the prescaler counter
and will not generate the “false” interrupt.
EXAMPLE 10-1: CHANGING BETWEEN
CAPTURE PRESCALERS
CLRF
CCP1CON
;Turn CCP module off
MOVLW
NEW_CAPT_PS
;Load the W reg with
; the new prescaler
; mode value and CCP ON
MOVWF
CCP1CON
;Load CCP1CON with this
; value
10.2
Compare Mode
In Compare mode, the 16-bit CCPR1 register value is
constantly compared against the TMR1 register pair
value. When a match occurs, the RC2/CCP1 pin is:
Driven High
Driven Low
Remains Unchanged
The action on the pin is based on the value of control
bits CCP1M3:CCP1M0 (CCP1CON<3:0>). At the
same time, interrupt ag bit CCP1IF is set.
FIGURE 10-3: COMPARE MODE
OPERATION BLOCK
DIAGRAM
Applicable Devices
72 73 73A 74 74A 76 77
CCPR1H CCPR1L
TMR1H
TMR1L
Comparator
QS
R
Output
Logic
Special Event Trigger
Set ag bit CCP1IF
(PIR1<2>)
match
RC2/CCP1
TRISC<2>
CCP1CON<3:0>
Mode Select
Output Enable
Pin
Special event trigger will:
reset Timer1, but not set interrupt ag bit TMR1IF (PIR1<0>),
and set bit GO/DONE (ADCON0<2>)
which starts an A/D conversion (CCP1 only for PIC16C72,
CCP2 only for PIC16C73/73A/74/74A/76/77).
10.2.1
CCP PIN CONFIGURATION
The user must congure the RC2/CCP1 pin as an out-
put by clearing the TRISC<2> bit.
10.2.2
TIMER1 MODE SELECTION
Timer1 must be running in Timer mode or Synchro-
nized Counter mode if the CCP module is using the
compare feature. In Asynchronous Counter mode, the
compare operation may not work.
10.2.3
SOFTWARE INTERRUPT MODE
When generate software interrupt is chosen the CCP1
pin is not affected. Only a CCP interrupt is generated (if
enabled).
10.2.4
SPECIAL EVENT TRIGGER
In this mode, an internal hardware trigger is generated
which may be used to initiate an action.
The special event trigger output of CCP1 resets the
TMR1 register pair. This allows the CCPR1 register to
effectively be a 16-bit programmable period register for
Timer1.
The special trigger output of CCP2 resets the TMR1
register pair, and starts an A/D conversion (if the A/D
module is enabled).
For the PIC16C72 only, the special event trigger output
of CCP1 resets the TMR1 register pair, and starts an
A/D conversion (if the A/D module is enabled).
Note:
Clearing the CCP1CON register will force
the RC2/CCP1 compare output latch to the
default low level. This is not the data latch.
Note:
The
special
event
trigger
from
the
CCP1and CCP2 modules will not set inter-
rupt ag bit TMR1IF (PIR1<0>).
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