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STCF03ITBR Datenblatt(PDF) 18 Page - STMicroelectronics |
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STCF03ITBR Datenblatt(HTML) 18 Page - STMicroelectronics |
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18 / 33 page ![]() Introduction STCF03I 18/33 The Register address byte determines the first register in which the read or write operation takes place. When the read or write operation is finished, the register address is automatically increased. 7.10 Writing to multiple registers with incremental addressing It would be unpractical to send several times the device address and the address of the register when writing to multiple registers. STCF03I supports writing to multiple registers with incremental addressing. When data is written to a register, the address register is automatically increased, so the next data can be sent without sending the device address and the register address again. See Figure 9 below. 7.11 Reading from a single register The reading operation starts with a START bit followed by the 7 bit device address of STCF03I. The 8th bit is the R/W bit, which is 0 in this case. STCF03I confirms the receiving of the address + R/W bit by an acknowledge pulse. The address of the register which should be read is sent afterwards and confirmed again by an acknowledge pulse of STCF03I again. Then the master generates a START bit again and sends the device address followed by the R/W bit, which is 1 now. STCF03I confirms the receiving of the address + R/W bit by an acknowledge pulse and starts to send the data to the master. No acknowledge pulse from the master is required after receiving the data. Then the master generates a STOP bit to terminate the communication. See Figure 10 Figure 9. Writing to multiple registers with incremental addressing S T A R T DEVICE ADDRESS 7 bits A C K W R I T E M S B L S B R / W A C K ADDRESS OF REGISTER i DATA i A C K A C K S T O P M S B M S B L S B L S B DATA i+1 A C K L S B DATA i+2 A C K L S B DATA i+2 L S B DATA i+n A C K M S B M S B M S B M S B M S B A C K L S B SDA LINE S T A R T DEVICE ADDRESS 7 bits A C K W R I T E M S B L S B R / W A C K ADDRESS OF REGISTER i DATA i A C K A C K S T O P M S B M S B L S B L S B DATA i+1 A C K L S B DATA i+2 A C K L S B DATA i+2 L S B DATA i+n A C K M S B M S B M S B M S B M S B A C K L S B S T A R T DEVICE ADDRESS 7 bits A C K W R I T E M S B L S B R / W A C K ADDRESS OF REGISTER i DATA i A C K A C K S T O P M S B M S B L S B L S B DATA i+1 A C K L S B DATA i+2 A C K L S B DATA i+2 L S B DATA i+n A C K M S B M S B M S B M S B M S B A C K L S B SDA LINE |
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