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HT16L21 Datasheet(PDF) 5 Page - Holtek Semiconductor Inc |
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HT16L21 Datasheet(HTML) 5 Page - Holtek Semiconductor Inc |
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5 / 36 page  Rev. 1.00 5 November 16, 2011 HT16L21 Timing Diagrams I2C timing SDA SCL tf tHD:STA tLOW tr tHD:DAT tSU:DAT tHIGH tSU:STA tHD:STA S Sr tSP tSU:STO P tBUF S tAA SDA OUT SPI timing tCSW tCSH tDS tHS tCW tCW tSYS DIO (INPUT ) CLK CSB 10% tCSL tPD DIO (OUTPUT ) 90% 90% 90% 90% 90% 90% 90% 90% 90% 90% 10% 10% 10% 10% 10% 10% 10% 10% VDD VSS VDD VSS VDD VSS VDD VSS 10% tPD Reset timing VDD Data transfer tPOF tSR 50% 0.9V 0.9V tRSON tRSOFF 50% 80% tRW tRSOFF tRSOFF RSTB 50% 50% 50% 50% 50% Note:1.IftheconditionsofresettimingarenotsatisfiedinpowerON/OFFsequence,theinternalpoweronreset (POR)circuitwillnotoperatenormally. 2.IftheVDDdropslowerthantheminimumoperatingvoltageduringoperating,theconditionsofpoweron resettimingmustalsobesatisfied.ThatistheVDDdropto0.9Vandkeepat0.9Vfor10ms(min.)before risingtothenormaloperatingvoltage. 3.DatatransfersontheI2CinterfaceorSPI3-wireserialinterfaceshouldatleastbedelayedfor1msafter thepower-onsequencetoensurethattheresetoperationiscomplete. |
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