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SH7052 bảng dữ liệu(PDF) 399 Page - Renesas Technology Corp |
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SH7052 bảng dữ liệu(HTML) 399 Page - Renesas Technology Corp |
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399 / 919 page ![]() 373 Select counter clock 1 Set port-ATU-II connection 2 Set input waveform edge detection 3 Start counter 4 Input capture operation Start Figure 10.53 Sample Setup Procedure for Input Capture Sample Setup Procedure for Waveform Output by Output Compare-Match: An example of the setup procedure for waveform output by output compare-match is shown in figure 10.54. 1. Select the first-stage counter clock ø' in prescaler register (PSCR), and the second-stage counter clock ø" with the CKSEL bit in the timer control register (TCR). When selecting an external clock, also select the external clock edge type with the CKEG bit in TCR. 2. Set the port control register corresponding to the waveform output port to ATU output compare-match output. Also set the corresponding bit to 1 in the port IO register to specify the output attribute for the port. 3. Select 0, 1, or toggle output for output compare-match output with the timer I/O control register (TIOR). If necessary, a timer interrupt request can be sent to the CPU on output compare-match by making the appropriate setting in the interrupt enable register (TIER). 4. Set the timing for compare-match generation in the ATU general register (GR) corresponding to the port set in 2. 5. Set the corresponding bit to 1 in the timer start register (TSTR) to start the free-running counter (TCNT). Waveform output is performed from the relevant port when the TCNT value and GR value match. |
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