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MC908QT4MPE Datasheet(PDF) 121 Page - Freescale Semiconductor, Inc |
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MC908QT4MPE Datasheet(HTML) 121 Page - Freescale Semiconductor, Inc |
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121 / 184 page ![]() Functional Description MC68HC908QY/QT Family Data Sheet, Rev. 5 Freescale Semiconductor 121 14.4 Functional Description Figure 14-2 shows the structure of the TIM. The central component of the TIM is the 16-bit TIM counter that can operate as a free-running counter or a modulo up-counter. The TIM counter provides the timing reference for the input capture and output compare functions. The TIM counter modulo registers, TMODH:TMODL, control the modulo value of the TIM counter. Software can read the TIM counter value at any time without affecting the counting sequence. The two TIM channels are programmable independently as input capture or output compare channels. Figure 14-2. TIM Block Diagram PRESCALER PRESCALER SELECT 16-BIT COMPARATOR PS2 PS1 PS0 16-BIT COMPARATOR 16-BIT LATCH TCH0H:TCH0L MS0A ELS0B ELS0A TOF TOIE 16-BIT COMPARATOR 16-BIT LATCH TCH1H:TCH1L CHANNEL 0 CHANNEL 1 TMODH:TMODL TRST TSTOP TOV0 CH0IE CH0F ELS1B ELS1A TOV1 CH1IE CH1MAX CH1F CH0MAX MS0B 16-BIT COUNTER MS1A INTERNAL BUS CLOCK TCH1 TCH0 INTERRUPT LOGIC PORT LOGIC INTERRUPT LOGIC INTERRUPT LOGIC PORT LOGIC PTA2/IRQ/KBI2/TCLK |
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