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LC717A00AJ Datasheet(PDF) 5 Page - ON Semiconductor |
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LC717A00AJ Datasheet(HTML) 5 Page - ON Semiconductor |
5 / 11 page LC717A00AJ No.A2089-5/11 Power-on Reset (POR) When power is turned on, power-on reset is enabled inside the LSI and its state is released after a certain power-on reset time, tPOR. Power-on reset operation condition: Power supply rise rate tVDD must be at least 1V/ms. Since INTOUT pin changes from “High” to “Low” at the same time as the released of power-on reset state, it is possible to verify the tPOR externally. During power-on reset state, Cin, Cref and Pout are unknown. fig.1 I 2C Compatible Bus Data Timing fig.2 I 2C Compatible Bus Communication Formats • Write format (data can be written into sequentially incremented addresses) START Slave Address Write=L Register Address (N) ACK ACK Data written to Register Address (N) ACK Data written to Register Address (N+1) ACK STOP Slave Slave Slave Slave fig.3 • Read format (data can be read from sequentially incremented addresses) START Slave Address Write=L Register Address (N) ACK ACK Data read from Register Address (N) ACK RESTART Slave Address Read=H ACK Data read from Register Address (N+1) ACK Data read from Register Address (N+2) NACK STOP Slave Slave Slave Master Master Master fig.4 SDA SCL START condition tHD;STA tLOW tHIGH tr repeated START condition STOP condition 10% tf 90% 10% 10% 90% 90% tHD;DTA tSU;DTA 10% 10% 10% 90% tSU;STA 90% 90% tHD;STA 90% 10% 90% 10% 90% 10% tSU;STO tBUF START condition 90% POR (LSI internal signal) RELEASE tPOR VDD RESET tVDD INTOUT VPOROP Cin, Cref, Pout UNKNOWN VALID tPOROP UNKNOWN UNKNOWN UNKNOWN RESET RELEASE tPOR VALID |
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