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DS1624S+ Datasheet(PDF) 3 Page - Maxim Integrated Products |
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DS1624S+ Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 20 page DS1624 3 of 20 DS1624 FUNCTIONAL BLOCK DIAGRAM Figure 1 2-WIRE SERIAL DATA BUS The DS1624 supports a bi–directional two–wire bus and data transmission protocol. A device that sends data onto the bus is defined as a transmitter, and a device receiving data as a receiver. The device that controls the message is called a “master”. The devices that are controlled by the master are “slaves”. The bus must be controlled by a master device which generates the serial clock (SCL), controls the bus access, and generates the START and STOP conditions. The DS1624 operates as a slave on the two–wire bus. Connections to the bus are made via the open–drain I/O lines SDA and SCL. The following bus protocol has been defined (See Figure 2): • Data transfer may be initiated only when the bus is not busy. • During data transfer, the data line must remain stable whenever the clock line is HIGH. Changes in the data line while the clock line is high will be interpreted as control signals. Accordingly, the following bus conditions have been defined: Bus not busy: Both data and clock lines remain HIGH. Start data transfer: A change in the state of the data line, from HIGH to LOW, while the clock is HIGH, defines a START condition. Stop data transfer: A change in the state of the data line, from LOW to HIGH, while the clock line is HIGH, defines the STOP condition. STATUS REGISTER & CONTROL LOGIC TEMPERATURE SENSOR EEPROM MEMORY (256 BYTES) ADDRESS AND I/O CONTROL VDD SCL SDA A1 A2 A0 GND |
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