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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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UPD17708 데이터시트(PDF) 158 Page - Renesas Technology Corp |
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UPD17708 데이터시트(HTML) 158 Page - Renesas Technology Corp |
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158 / 358 page  µPD17704, 17705, 17707, 17708, 17709 156 Therefore, as shown in Figure 13-7, the error of the time until the BTM0CY flag is first set after the BTM0CY flag setting time has been changed is as follows: –tSET < Error < tCHECK tSET : new setting time of BTM0CY flag tCHECK : time to detect BTM0CY flag Phase differences are provided among the internal pules of 10, 20, 50, and 100 Hz. Because these phase differences are shorter than the newly set pulse time, they are included in the above error. Figure 13-7. Timer Error When BTM0CY Flag Setting Time Is Changed from A to B H L H L H L H L tSET SKT1 BTM0CY Intrinsic timer time Actual timer time Time changed Internal pulse A Internal pulse B BTM0CY flag setting pulse BTM0CY flag tSET tCHECK Actual timer time Intrinsic timer time Time changed An error of tCHECK occurs if the timer time is changed immediately after BTM0CY flag has been detected because the flag is then reset once. An error of -tSET occurs if BTM0CY flag is detected immediately after the timer time has been changed because the flag then becomes “1”. |
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