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HT1625 Datasheet(PDF) 7 Page - Holtek Semiconductor Inc |
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HT1625 Datasheet(HTML) 7 Page - Holtek Semiconductor Inc |
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7 / 15 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 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 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 Serial Data Clock (WR Pin) 3V Duty cycle 50% ¾¾ 150 kHz 5V ¾¾ 300 kHz fCLK2 Serial Data Clock (RD Pin) 3V Duty cycle 50% ¾¾ 75 kHz 5V ¾¾ 150 kHz tCS Serial 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 ¾¾ 5V Write mode 1.67 ¾¾ ms Read mode 3.34 ¾¾ tr,tf Rise or Fall Time Serial Data Clock Width (Figure 1) 3V ¾¾ 120 ¾ ns 5V tsu Setup Time for DATA to WR,RD Clock Width (Figure 2) 3V ¾¾ 120 ¾ ns 5V th Hold Time for DATA 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 HT1625 Rev. 1.10 7 September 11, 2002 5 0 % V A L I D D A T A 5 0 % D B W R , R D C l o c k G N D t s u t h V D D V D D G N D Figure 2 C S G N D 5 0 % 5 0 % . I R S T C l o c k L A S T C l o c k G N D W R , R D C l o c k t s u 1 t h 1 t C S V D D V D D Figure 3 9 0 % 5 0 % 1 0 % G N D W R , R D C l o c k t f t r t C L K t C L K V D D Figure 1 |
Similar Part No. - HT1625 |
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Similar Description - HT1625 |
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