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PIC16F627-20/P 参数 Datasheet PDF下载

PIC16F627-20/P图片预览
型号: PIC16F627-20/P
PDF下载: 下载PDF文件 查看货源
内容描述: 基于闪存的8位CMOS微控制器 [FLASH-Based 8-Bit CMOS Microcontrollers]
分类和应用: 闪存微控制器和处理器外围集成电路光电二极管时钟
文件页数/大小: 160 页 / 1657 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC16F62X  
10.3.3 SET-UP FOR PWM OPERATION  
The following steps should be taken when configuring  
the CCP module for PWM operation:  
1. Set the PWM period by writing to the PR2 regis-  
ter.  
2. Set the PWM duty cycle by writing to the  
CCPR1L register and CCP1CON<5:4> bits.  
3. Make the CCP1 pin an output by clearing the  
TRISB<3> bit.  
4. Set the TMR2 prescale value and enable Timer2  
by writing to T2CON.  
5. Configure the CCP1 module for PWM operation.  
TABLE 10-3  
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 20 MHz  
PWM Frequency  
1.22 kHz 4.88 kHz 19.53 kHz 78.12 kHz 156.3 kHz 208.3 kHz  
Timer Prescaler (1, 4, 16)  
PR2 Value  
16  
4
1
1
1
1
0xFF  
10  
0xFF  
10  
0xFF  
10  
0x3F  
8
0x1F  
7
0x17  
5.5  
Maximum Resolution (bits)  
TABLE 10-4  
REGISTERS ASSOCIATED WITH PWM AND TIMER2  
Value on  
all other  
resets  
Value on  
POR  
Address  
Name  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
0000 000x 0000 000u  
0Bh/8Bh/  
INTCON  
GIE  
PEIE  
T0IE  
INTE  
RBIE  
T0IF  
INTF  
RBIF  
10Bh/18Bh  
0000 -000 0000 -000  
0000 -000 0000 -000  
1111 1111 1111 1111  
0000 0000 0000 0000  
1111 1111 1111 1111  
-000 0000 uuuu uuuu  
0Ch  
8Ch  
87h  
11h  
92h  
12h  
PIR1  
PIE1  
EEIF  
CMIF  
RCIF  
TXIF  
CCP1IF TMR2IF TMR1IF  
CCP1IE TMR2IE TMR1IE  
EEIE  
CMIE  
RCIE  
TXIE  
PORTB Data Direction Register  
Timer2 module’s register  
TRISB  
TMR2  
PR2  
Timer2 module’s period register  
TOUTPS TOUTPS TOUTPS TOUTPS TMR2ON T2CKPS T2CKPS  
T2CON  
3
2
1
0
1
0
xxxx xxxx uuuu uuuu  
xxxx xxxx uuuu uuuu  
--00 0000 --00 0000  
Capture/Compare/PWM register1 (LSB)  
Capture/Compare/PWM register1 (MSB)  
15h  
16h  
17h  
CCPR1L  
CCPR1H  
CCP1CON  
CCP1X  
CCP1Y CCP1M3 CCP1M2 CCP1M1 CCP1M0  
Legend: x= unknown, u= unchanged, -= unimplemented read as '0'. Shaded cells are not used by PWM and Timer2.  
1999 Microchip Technology Inc.  
Preliminary  
DS40300B-page 67