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EM78P459AK Datasheet(PDF) 38 Page - ELAN Microelectronics Corp |
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EM78P459AK Datasheet(HTML) 38 Page - ELAN Microelectronics Corp |
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38 / 76 page  EM78P458/459 OTP ROM Data Bus Data Bus PRD1 Com parator Com parator TM R1H + TM R1L S RQ MUX Duty Cycle Match Period Match PWM1 T1P0 T1P1 T1EN IOC51 PRD2 Com parator Com parator S RQ MUX Duty Cycle Match Period Match PWM2 T2P0 T2P1 T2EN IOC51 To PW M 1IF To PW M 2IF reset reset latch latch 1:2 1:8 1:32 Fosc 1:64 1:2 1:8 1:32 Fosc 1:64 TM R2H + TM R2L DT2H + DT2L DT1H + DT1L DL2H + DL2L DL1H + DL1L Fig. 13 The Functional Block Diagram of the Dual PWMs Period Duty Cycle DT1 = TMR1 PRD1 = TMR1 Fig. 14 The Output Timing of the PWM 2. Increment Timer Counter ( TMRX: TMR1H/TWR1L or TMR2H/TWR2L ) TMRX are ten-bit clock counters with programmable prescalers. They are designed for the PWM module as baud rate clock generators. TMRX can be read, written, and cleared at any reset conditions. If employed, they can be turned down for power saving by setting T1EN bit [PWMCON<4>] or T2EN bit [PWMCON<5>] to 0. 3. PWM Period ( PRDX : PRD1 or PRD2 ) The PWM period is defined by writing to the PRDX register. When TMRX is equal to PRDX, the This specification is subject to change without prior notice. 06.25.2004 (V1.4) 38 |
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