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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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UPD17708 데이터시트(PDF) 308 Page - NEC |
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UPD17708 데이터시트(HTML) 308 Page - NEC |
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308 / 356 page  308 µPD17704, 17705, 17707, 17708, 17709 The operation of CE reset differs depending on whether the clock stop instruction is used or not. This difference is described in 21.2.1 and 21.2.2 below. 21.2.3 describes the points to be noted when CE reset is effected. 21.2.1 CE reset without clock stop (STOP s) instruction Figure 21-2 shows the operation. When the CE pin has gone high, the CE reset timer carry counter starts counting at the rising edge of the basic timer 0 carry FF setting pulse. Figure 21-3. CE Reset Operation without Clock Stop Instruction (1/2) (a) Normal operation • When “N” is set to CE reset timer carry counter • When “1” is set to CE reset timer carry counter VDD CE XOUT BTM0CY flag setting pulse CE reset timer carry counter Set value of CE reset timer carry counter CE reset signal 5 V 0 V H L H L H L H L H H L L tSET 0 1 2 3 N–2 N–1 N 0 N CE reset VDD CE XOUT BTM0CY flag setting pulse CE reset timer carry counter Set value of CE reset timer carry counter CE reset signal CE reset 5 V 0 V H L H L H L H L H H L L tSET 01 0 1 |
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