поискавой системы для электроныых деталей |
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ST7032 датащи(PDF) 11 Page - Sitronix Technology Co., Ltd. |
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ST7032 датащи(HTML) 11 Page - Sitronix Technology Co., Ltd. |
11 / 63 page ST7032 V1.4 2008/08/18 11/61 · Multi-Master: more than one master can attempt to control the bus at the same time without corrupting the message · Arbitration: procedure to ensure that, if more than one master simultaneously tries to control the bus, only one is allowed to do so and the message is not corrupted · Synchronization: procedure to synchronize the clock signals of two or more devices. ACKNOWLEDGE Acknowledge is not Busy Flag in I2C interface. Each byte of eight bits is followed by an acknowledge bit. The acknowledge bit is a HIGH signal put on the bus by the transmitter during which time the master generates an extra acknowledge related clock pulse. A slave receiver which is addressed must generate an acknowledge after the reception of each byte. A master receiver must also generate an acknowledge after the 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 (set-up and hold times must be taken into consideration). A master receiver must signal an end-of-data to the transmitter by not generating an acknowledge on the last byte that has been clocked out of the slave. In this event the transmitter must leave the data line HIGH to enable the master to generate a STOP condition. Acknowledgement on the I 2C Interface is illustrated in Fig.4. SDA SCL data line stable; data valid change of data allowed Figure 1. Bit transfer SDA SCL SP START con dition STOP con dition Figure 2. Definition of START and STOP conditions MASTER TRANSMITTER/ RECEIVER SLAVE RECEIVER (1) 0111100 SLAVE RECEIVER (2) 0111101 SLAVE RECEIVER (3) 0111110 SLAVE RECEIVER (4) 0111111 SDA SCL Figure 3. System configuration |
Аналогичный номер детали - ST7032 |
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Аналогичное описание - ST7032 |
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