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R1EX24064ASAS0A Datasheet(PDF) 10 Page - Renesas Technology Corp |
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R1EX24064ASAS0A Datasheet(HTML) 10 Page - Renesas Technology Corp |
10 / 24 page R1EX24064AxxS0A Acknowledge All addresses and data words are serially transmitted to and from in 8-bit words. The receiver sends a zero to acknowledge that it has received each word. This happens during ninth clock cycle. The transmitter keeps bus open to receive acknowledgment from the receiver at the ninth clock. In the write operation, EEPROM sends a zero to acknowledge after receiving every 8-bit words. In the read operation, EEPROM sends a zero to acknowledge after receiving the device address word. After sending read data, the EEPROM waits acknowledgment by keeping bus open. If the EEPROM receives zero as an acknowledge, it sends read data of next address. If the EEPROM receives acknowledgment "1" (no acknowledgment) and a following stop condition, it stops the read operation and enters a stand-by mode. If the EEPROM receives neither acknowledgment "0" nor a stop condition, the EEPROM keeps bus open without sending read data. Acknowledge Timing Waveform SCL SDA IN SDA OUT 12 8 9 Acknowledge out REJ03C0332-0200 Rev.2.00 Oct. 26, 2009 Page 10 of 22 |
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