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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT1647 датащи(PDF) 8 Page - Holtek Semiconductor Inc |
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HT1647 датащи(HTML) 8 Page - Holtek Semiconductor Inc |
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8 / 24 page  A.C. Characteristics Ta=25°C Symbol Parameter Test Conditions Min. Typ. Max. Unit VDD Conditions fSYS1 System Clock 3V On-chip RC oscillator 22 32 40 kHz 5V 24 32 40 kHz fSYS2 System Clock 3V Crystal oscillator ¾ 32.768 ¾ kHz 5V ¾ 32.768 ¾ kHz fSYS3 System Clock 3V External clock source ¾ 32 ¾ kHz 5V ¾ 32 ¾ kHz fLCD1 LCD Frame Frequency 3V On-chip RC oscillator 44 64 80 Hz 5V 48 64 80 Hz fLCD2 LCD Frame Frequency 3V Crystal oscillator ¾ 64 ¾ Hz 5V ¾ 64 ¾ Hz fLCD3 LCD Frame Frequency 3V External clock source ¾ 64 ¾ Hz 5V ¾ 64 ¾ Hz tCOM LCD Common Period ¾ n: Number of COM ¾ n/fLCD ¾ sec fCLK1 4-Bit Data Clock (WR Pin) 3V Duty cycle 50% ¾¾ 150 kHz 5V ¾¾ 300 kHz fCLK2 4-Bit Data Clock (RD Pin) 3V Duty cycle 50% ¾¾ 75 kHz 5V ¾¾ 150 kHz tCS 4-Bit Interface Reset Pulse Width (Figure 3) ¾ CS ¾ 250 ¾ ns tCLK WR,RD Input Pulse Width (Figure 1) 3V Write mode 3.34 ¾¾ ms Read mode 6.67 5V Write mode 1.67 ¾¾ ms Read mode 3.34 tr,tf Rise/Fall Time Serial Data Clock Width (Figure 1) 3V ¾¾ 120 ¾ ns 5V tsu Setup Time for DB to WR, RD Clock Width (Figure 2) 3V ¾¾ 120 ¾ ns 5V th Hold Time for DB to WR,RD Clock Width (Figure 2) 3V ¾¾ 120 ¾ ns 5V tsu1 Setup Time for CS to WR,RD Clock Width (Figure 3) 3V ¾¾ 100 ¾ ns 5V th1 Hold Time for CS to WR,RD Clock Width (Figure 3) 3V ¾¾ 100 ¾ ns 5V HT1647 8 April 21, 2000 |
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