ADP5585ACPZ-00-R7 datasheet(16/40 Pages) AD

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ADP5585

Data Sheet

Rev. C | Page 16 of 40

Figure 26 shows a typical multibyte read sequence for reading

internal registers. The cycle begins with a start condition, followed

by the 7-bit device address (0x34 for all models except the

ADP5585ACPZ-03-R7, 0x30 for the ADP5585ACPZ-03-R7

only), followed by the R/W bit set to 0 for a write cycle. The

ADP5585 acknowledges the address byte by pulling the data

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

is sent next. The ADP5585 acknowledges the register pointer byte

by pulling the data line low. A start condition is repeated, followed

by the 7-bit device address (0x34 for all models except the

ADP5585ACPZ-03-R7, 0x30 for the ADP5585ACPZ-03-R7

only), followed by the R/W bit set to 1 for a read cycle. The

ADP5585 acknowledges the address byte by pulling the data

line low. The 8-bit data is then read. The address pointer is then

incremented to read the next data byte, and the host continues to

pull the data line low for each byte (master acknowledge) until

the n data byte is read. The host pulls the data line high (no

acknowledge) after the last byte is read, and a stop condition

completes the sequence.

START

0 = WRITE

7-BIT DEVICE ADDRESS

ADP5585 ACK

8-BIT REGISTER POINTER

READ BYTE 1

READ BYTE 2

READ BYTE n

REPEAT START

1 = READ

ADP5585 ACK

MASTER ACK

NO ACK

STOP

Figure 26. I2C Multibyte Read Sequence

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