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ADP1650ACBZ-R7 Datasheet(PDF) 19 Page - Analog Devices |
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ADP1650ACBZ-R7 Datasheet(HTML) 19 Page - Analog Devices |
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19 / 32 page  ADP1650 Rev. C | Page 19 of 32 I2C INTERFACE The ADP1650 includes an I2C-compatible serial interface for control of the LED current, as well as for readback of 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 42 illustrates the I2C write sequence to a single register. The subaddress content selects which of the nine ADP1650 registers is written to. The ADP1650 sends an acknowledgment to the master after the 8-bit data byte has been written. Figure 43 shows the I2C read sequence of a single register. The register definitions are shown in the I2C Register Map section. SUBADDRESS CHIP ADDRESS 0 1 100 00 0 00 0 = WRITE 0 ADP1650 RECEIVES DATA S T S P MASTER STOP Figure 42. I2C Single Register Write Sequence CHIP ADDRESS 01 100 0 0 0 0 1 0 MASTER STOP CHIP ADDRESS S T S T 0 1 10 00 0 0 1 0 0 = WRITE 1 = READ S P ADP1650 SENDS DATA SUBADDRESS Figure 43. I2C Single Register Read Sequence |
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