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ADP1649ACBZ-R7 数据表(PDF) 18 Page - Analog Devices |
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ADP1649ACBZ-R7 数据表(HTML) 18 Page - Analog Devices |
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18 / 28 page ![]() ADP1649 Data Sheet Rev. 0 | Page 18 of 28 I²C INTERFACE The ADP1649 includes an I2C-compatible serial interface for control of the LED current, as well as for readback of the system status registers. The I2C chip address is 0x30 (0x60 in write mode and 0x61 in read mode). Additional I2C addresses are available on request. Figure 39 illustrates the I2C write sequence to a single register. The subaddress content selects which of the nine ADP1649 registers is written to. The ADP1649 sends an acknowledgment to the master after the 8-bit data byte has been written. Figure 40 shows the I2C read sequence of a single register. See the I²C Register Map section for a list of register definitions. Figure 39. I2C Single Register Write Sequence Figure 40. I2C Single Register Read Sequence SUBADDRESS CHIP ADDRESS 0 1 1 0 0 0 0 0 0 0 0 = WRITE 0 ADP1649 RECEIVES DATA S T S P MASTER STOP CHIP ADDRESS 0 1 1 0 0 0 0 0 0 1 0 MASTER STOP CHIP ADDRESS S T S T 0 1 1 0 0 0 0 0 1 0 0 = WRITE 1 = READ S P ADP1649 SENDS DATA SUBADDRESS |
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