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PIC18F23K22-E/ML датащи(PDF) 173 Page - Microchip Technology |
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PIC18F23K22-E/ML датащи(HTML) 173 Page - Microchip Technology |
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173 / 496 page ![]() 2010 Microchip Technology Inc. Preliminary DS41412C-page 173 PIC18(L)F2X/4XK22 13.0 TIMER2/4/6 MODULE There are three identical 8-bit Timer2-type modules available. To maintain pre-existing naming conventions, the Timers are called Timer2, Timer4 and Timer6 (also Timer2/4/6). The Timer2/4/6 module incorporates the following features: • 8-bit Timer and Period registers (TMRx and PRx, respectively) • Readable and writable (both registers) • Software programmable prescaler (1:1, 1:4, 1:16) • Software programmable postscaler (1:1 to 1:16) • Interrupt on TMRx match with PRx, respectively • Optional use as the shift clock for the MSSPx modules (Timer2 only) See Figure 13-1 for a block diagram of Timer2/4/6. FIGURE 13-1: TIMER2/4/6 BLOCK DIAGRAM Note: The ‘x’ variable used in this section is used to designate Timer2, Timer4, or Timer6. For example, TxCON references T2CON, T4CON, or T6CON. PRx references PR2, PR4, or PR6. Comparator TMRx Sets Flag TMRx Output Reset Postscaler Prescaler PRx 2 FOSC/4 1:1 to 1:16 1:1, 1:4, 1:16 EQ 4 bit TMRxIF TxOUTPS<3:0> TxCKPS<1:0> |
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