RV-3029 Datasheet, PDF (49/67 Pages) MICORO CRYSTAL SWITZERLAND – DTCXO Temperature Compensated Real Time Clock

Micro Crystal
DTCXO Temperature Compensated Real Time Clock / Calendar Module
RV-3029
6.5. ACKNOWLEDGE
There is no limit to the numbers of data bytes transmitted between the start and stop conditions. Each byte (of 8
bits) is followed by an acknowledge cycle. Therefore, the Master generates an extra acknowledge clock pulse. The
acknowledge bit is a HIGH level signal put on the SDA line by the Transmitter Device. The Receiver Device must
pull down the SDA line during the acknowledge clock pulse to confirm the correct reception of the last byte.
• A Slave-Receiver, which is addressed, must generate an acknowledge after the correct reception of each
byte
• Also a Master-Receiver must generate an acknowledge after correct reception of each byte that has been
clocked out of the Slave-Transmitter
• The device that acknowledges must pull down the SDA line during the acknowledge clock pulse, so that
the SDA line is stable LOW during the HIGH period of the acknowledge related clock pulse (setup and hold
times must be taken into consideration)
• If the Master is addressed as Receiver, it can stop data transmission by not generating an acknowledge on
the last byte that has been sent from the Slave-Transmitter. In this event, the Slave-Transmitter must leave
the data line HIGH to enable the Master to generate a stop condition
Acknowledgement on the I²C interface
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