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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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HT1621 데이터시트(PDF) 4 Page - ARTSCHIP ELECTRONICS CO.,LMITED. |
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HT1621 데이터시트(HTML) 4 Page - ARTSCHIP ELECTRONICS CO.,LMITED. |
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4 / 14 page  HT1621 www.artschip.com 4 A.C. Characteristics Ta=25℃ Test Conditions Symbol Parameter VDD Conditions Min. Typ. Max. Unit fSYS1 System clock — On-chip RC oscillator — 256 — kHz fSYS2 System clock — Crystal oscillator — 32.768 — kHz fSYS3 System clock — External clock source — 256 — kHz — On-chip RC oscillator — fSYS1/1024 — Hz — Crystal oscillator — fSYS2/128 — Hz fLCD LCD Clock — External clock source — fSYS3/1024 — Hz tCOM LCD Common Period — n: Number of COM — n/ fLCD — s 3V 4 — 150 kHz fCLK1 Serial Data Clock ( pin) 5V Duty cycle 50% 4 — 300 kHz 3V — — 75 kHz fCLK2 Serial Data Clock ( pin) 5V Duty cycle 50% — — 150 kHz fTONE Tone Frequency — On-chip RC oscillator — 2.0 or 4.0 — kHz tCS Serial Interface Reset Pulse Width (Figure 3) — — 250 — ns Write mode 3.34 — 125 3V Read mode 6.67 — — µs Write mode 1.67 — 125 tCLK , Input Pulse Width (Figure 1) 5V Read mode 3.34 — — µs tr, tf Rise/Fall Time Serial Data Clock Width (Figure 1) — — — 120 — ns tau Setup Time for DATA to , Clock Width (Figure 2) — — — 120 — ns th Hold Time for DATA to , Clock Width (Figure 2) — — — 120 — ns tau1 Setup Time for to , Clock Width (Figure 3) — — — 100 — ns th1 Hold Time for to , Clock Width (Figure 2) — — — 100 — ns Figure 1 Figure 2 Figure 3 |
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