M41TC8025AMC5F datasheet(10/41 Pages) STMICROELECTRONICS

Part #	M41TC8025AMC5F

Description	Highly accurate, temperature-compensated serial real-time clock (RTC) with embedded crystal

PDF	41 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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10 / 41 page

Operation

M41TC8025

10/41

DocID022873 Rev 4

2.2.5

Acknowledge

Each byte of eight bits is followed by one acknowledge bit. This acknowledge bit is a low

level put on the bus by the receiver whereas the master generates an extra acknowledge

related clock pulse. A slave receiver which is addressed is obliged to generate an

acknowledge after the reception of each byte that has been clocked out of the slave

transmitter.

The device that acknowledges has to pull down the SDA line during the acknowledge clock

pulse in such a way that the SDA line is a stable low during the high period of the

acknowledge related clock pulse. Of course, setup and hold times must be taken into

account. A master receiver must signal an end of data to the slave transmitter by not

generating an acknowledge on the last byte that has been clocked out of the slave. In this

case the transmitter must leave the data line high to enable the master to generate the

STOP condition.

Figure 5. Serial bus transfer sequence

Figure 6. Acknowledgement sequence

Obsolete

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- Obsolete

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M41TC8025AMC5F Datasheet(PDF) 10 Page - STMicroelectronics