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PIC18F4539-E/MLSQTP 데이터시트(PDF) 112 Page - Microchip Technology |
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PIC18F4539-E/MLSQTP 데이터시트(HTML) 112 Page - Microchip Technology |
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112 / 322 page ![]() PIC18FXX39 DS30485A-page 110 Preliminary 2002 Microchip Technology Inc. 13.1 Timer3 Operation Timer3 can operate in one of these modes: •As a timer • As a synchronous counter • As an asynchronous counter The Operating mode is determined by the clock select bit, TMR3CS (T3CON<1>). When TMR3CS = 0, Timer3 increments every instruction cycle. When TMR3CS = 1, Timer3 increments on every rising edge of the Timer1 external clock input. FIGURE 13-1: TIMER3 BLOCK DIAGRAM FIGURE 13-2: TIMER3 BLOCK DIAGRAM CONFIGURED IN 16-BIT READ/WRITE MODE TMR3H TMR3L T3SYNC TMR3CS T3CKPS1:T3CKPS0 SLEEP Input TMR3IF Overflow Interrupt FOSC/4 Internal Clock TMR3ON On/Off Prescaler 1, 2, 4, 8 Synchronize det 1 0 0 1 Synchronized Clock Input 2 Flag bit T13CKI Timer3 TMR3L T3SYNC TMR3CS T3CKPS1:T3CKPS0 SLEEP Input FOSC/4 Internal Clock TMR3ON On/Off Prescaler 1, 2, 4, 8 Synchronize det 1 0 0 1 Synchronized Clock Input 2 TMR3 T13CKI To Timer1 Clock Input High Byte Data Bus<7:0> 8 TMR3H 8 8 8 Read TMR3L Write TMR3L Set TMR3IF Flag bit on Overflow |
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