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ADP5586ACBZ-03-R7 датащи(PDF) 18 Page - Analog Devices

номер детали ADP5586ACBZ-03-R7
подробное описание детали  Keypad Decoder and I/O Port Expander
PDF  44 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

ADP5586ACBZ-03-R7 датащи(HTML) 18 Page - Analog Devices

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ADP5586
Data Sheet
Rev. 0 | Page 18 of 44
Figure 27 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), followed by the R/W bit set
to 0 for a write cycle. The ADP5586 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 ADP5586 acknowl-
edges the register pointer byte by pulling the data line low. A start
condition is repeated, followed by the 7-bit device address (0x34),
followed by the R/W bit set to 1 for a read cycle. The ADP5586
acknowledges the address byte by pulling the data line low.
Next, 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
7-BIT DEVICE ADDRESS
ADP5586 ACK
8-BIT REGISTER POINTER
READ BYTE 1
READ BYTE 2
READ BYTE n
0
0
0
1
0
0
0
0
1
REPEAT START
1 = READ
ADP5586 ACK
ADP5586 ACK
MASTER ACK
MASTER ACK
MASTER ACK
NO ACK
STOP
Figure 27. I2C Multibyte Read Sequence



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