ADP5587ACPZ-R7 datasheet(14/24 Pages) AD

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ADP5587

Rev. B | Page 14 of 24

I2C PROGRAMMING AND DIGITAL CONTROL

The ADP5587 provides full software programmability to

facilitate its adoption in various product architectures. All

(01101001) for a read and Address 0x68 (01101000) for a write.

All communication to the ADP5587 is performed via its I2C-

compatible serial interface. Figure 16 shows a typical write

sequence for programming an internal register. The cycle

begins with a start condition followed by the chip write address

(0x68). The ADP5587 acknowledges the chip write address byte

by pulling the data line low. The address of the register to which

data is to be written is sent next. The ADP5587 acknowledges

the register address byte by pulling the data line low. The data

byte to be written is sent next. The ADP5587 acknowledges the

data byte by pulling the data line low, and a stop condition

completes the sequence.

Figure 17 shows a typical read sequence for reading back an

internal register. The cycle begins with a start condition

followed by the chip write address (0x68). The ADP5587

acknowledges the chip write address byte by pulling the data

line low. The address of the register from which data is to be

read is sent next. The ADP5587 acknowledges the register

address byte by pulling the data line low. The cycle continues

with a repeat start followed by the chip read address (0x69). The

ADP5587 acknowledges the chip read address byte by pulling

the data line low. The ADP5587 places the contents of the

previously addressed register on the bus for readback. There is

no acknowledge following the readback data byte, and a stop

condition completes the cycle.

SUBADDRESS

CHIP ADDRESS

0 SP

0 = WRITE

ADP5587 RECEIVES DATA

Figure 16. I2C Write Sequence

SUBADDRESS

CHIP ADDRESS

1 = READ

ADP5587 SENDS DATA

0 = WRITE

Figure 17. I2C Read and Write Sequences

READ START ADDR

CHIP ADDRESS

ST 0

1 = READ

ADP5587 SENDS DATA 1

0 = WRITE

ADP5587 SENDS DATA N

...

Figure 18. I2C Read Auto-Increment

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