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PIC18F24J10-I/SO 参数 Datasheet PDF下载

PIC18F24J10-I/SO图片预览
型号: PIC18F24J10-I/SO
PDF下载: 下载PDF文件 查看货源
内容描述: 28 /40/ 44引脚高性能, RISC微控制器 [28/40/44-Pin High-Performance, RISC Microcontrollers]
分类和应用: 微控制器
文件页数/大小: 368 页 / 5652 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC18F45J10 FAMILY  
EXAMPLE 12-1:  
IMPLEMENTING A REAL-TIME CLOCK USING A TIMER1 INTERRUPT SERVICE  
RTCinit  
MOVLW  
MOVWF  
CLRF  
80h  
TMR1H  
TMR1L  
; Preload TMR1 register pair  
; for 1 second overflow  
MOVLW  
MOVWF  
CLRF  
b’00001111’  
T1CON  
secs  
; Configure for external clock,  
; Asynchronous operation, external oscillator  
; Initialize timekeeping registers  
;
CLRF  
mins  
MOVLW  
MOVWF  
BSF  
.12  
hours  
PIE1, TMR1IE  
; Enable Timer1 interrupt  
RETURN  
RTCisr  
BSF  
BCF  
INCF  
MOVLW  
CPFSGT  
RETURN  
CLRF  
TMR1H, 7  
PIR1, TMR1IF  
secs, F  
.59  
; Preload for 1 sec overflow  
; Clear interrupt flag  
; Increment seconds  
; 60 seconds elapsed?  
secs  
; No, done  
secs  
mins, F  
.59  
; Clear seconds  
; Increment minutes  
; 60 minutes elapsed?  
INCF  
MOVLW  
CPFSGT  
RETURN  
CLRF  
mins  
; No, done  
mins  
hours, F  
.23  
; clear minutes  
; Increment hours  
; 24 hours elapsed?  
INCF  
MOVLW  
CPFSGT  
RETURN  
CLRF  
hours  
; No, done  
; Reset hours  
; Done  
hours  
RETURN  
TABLE 12-2: REGISTERS ASSOCIATED WITH TIMER1 AS A TIMER/COUNTER  
Reset  
Values  
on page  
Name  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
INTCON  
PIR1  
GIE/GIEH PEIE/GIEL TMR0IE  
INT0IE  
TXIF  
RBIE  
TMR0IF  
CCP1IF  
CCP1IE  
CCP1IP  
INT0IF  
TMR2IF  
TMR2IE  
TMR2IP  
RBIF  
47  
49  
49  
49  
48  
48  
48  
PSPIF(1)  
PSPIE(1)  
PSPIP(1)  
ADIF  
ADIE  
ADIP  
RCIF  
RCIE  
RCIP  
SSP1IF  
SSP1IE  
SSP1IP  
TMR1IF  
TMR1IE  
TMR1IP  
PIE1  
TXIE  
TXIP  
IPR1  
TMR1L  
TMR1H  
T1CON  
Timer1 Register Low Byte  
Timer1 Register High Byte  
RD16  
T1RUN T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON  
Legend: Shaded cells are not used by the Timer1 module.  
Note 1: These bits are not implemented on 28-pin devices and should be read as ‘0’.  
DS39682E-page 124  
© 2009 Microchip Technology Inc.