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PIC16LC773-04/SP Datasheet(PDF) 42 Page - Microchip Technology |
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PIC16LC773-04/SP Datasheet(HTML) 42 Page - Microchip Technology |
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42 / 200 page  PIC16C77X DS30275A-page 42 Advance Information © 1999 Microchip Technology Inc. 5.1.1 TIMER1 COUNTER OPERATION In this mode, Timer1 is being incremented via an exter- nal source. Increments occur on a rising edge. After Timer1 is enabled in counter mode, the module must first have a falling edge before the counter begins to increment. FIGURE 5-2: TIMER1 INCREMENTING EDGE FIGURE 5-3: TIMER1 BLOCK DIAGRAM T1CKI (Default high) T1CKI (Default low) Note: Arrows indicate counter increments. TMR1H TMR1L T1OSC T1SYNC TMR1CS T1CKPS1:T1CKPS0 SLEEP input T1OSCEN Enable Oscillator(1) FOSC/4 Internal Clock TMR1ON on/off Prescaler 1, 2, 4, 8 Synchronize det 1 0 0 1 Synchronized clock input 2 RC0/T1OSO/T1CKI RC1/T1OSI Note 1: When the T1OSCEN bit is cleared, the inverter and feedback resistor are turned off. This eliminates power drain. Set flag bit TMR1IF on Overflow TMR1 |
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