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STA326 数据表(PDF) 9 Page - STMicroelectronics

部件名 STA326
功能描述  2.1 HIGH EFFICIENCY DIGITAL AUDIO SYSTEM
PDF  43 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA326 数据表(HTML) 9 Page - STMicroelectronics

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STA326
6.4 READ OPERATION
6.4.1
Current Address Byte Read
Following the START condition the master sends a device select code with the RW bit set to 1. The
STA326 acknowledges this and then responds by sending one byte of data. The master then terminates
the transfer by generating a STOP condition.
6.4.1.1Current Address Multi-byte Read
The multi-byte read modes can start from any internal address. Sequential data bytes will be read from
sequential addresses within the STA326. The master acknowledges each data byte read and then gen-
erates a STOP condition terminating the transfer.
6.4.2
Random Address Byte Read
Following the START condition the master sends a device select code with the RW bit set to 0. The
STA326 acknowledges this and then the master writes the internal address byte. After receiving, the in-
ternal byte address the STA326 again responds with an acknowledgement. The master then initiates an-
other START condition and sends the device select code with the RW bit set to 1. The STA326
acknowledges this and then responds by sending one byte of data. The master then terminates the trans-
fer by generating a STOP condition.
6.4.2.1Random Address Multi-byte Read
The multi-byte read modes could start from any internal address. Sequential data bytes will be read from
sequential addresses within the STA326. The master acknowledges each data byte read and then gen-
erates a STOP condition terminating the transfer.
6.5 Write Mode Sequence
Figure 9. I2C Write Procedure
6.6 Read Mode Sequence
Figure 10. I2C Read Procedure
DEV-ADDR
ACK
START
RW
SUB-ADDR
ACK
DATA IN
ACK
STOP
BYTE
WRITE
DEV-ADDR
ACK
START
RW
SUB-ADDR
ACK
DATA IN
ACK
STOP
MULTIBYTE
WRITE
DATA IN
ACK
DEV-ADDR
ACK
START
RW
DATA
NO ACK
STOP
CURRENT
ADDRESS
READ
DEV-ADDR
ACK
START
RW
SUB-ADDR
ACK
DEV-ADDR
ACK
STOP
RANDOM
ADDRESS
READ
DATA
NO ACK
START
RW
DEV-ADDR
ACK
START
DATA
ACK
DATA
ACK
STOP
SEQUENTIAL
CURRENT
READ
DATA
NO ACK
DEV-ADDR
ACK
START
RW
SUB-ADDR
ACK
DEV-ADDR
ACK
DEV-ADDR
ACK
START
RW
DATA
NO ACK
STOP
CURRENT
ADDRESS
READ
DEV-ADDR
ACK
START
RW
SUB-ADDR
ACK
DEV-ADDR
ACK
STOP
RANDOM
ADDRESS
READ
DATA
NO ACK
START
RW
DEV-ADDR
ACK
START
DATA
ACK
DATA
ACK
STOP
SEQUENTIAL
CURRENT
READ
DATA
NO ACK
DEV-ADDR
ACK
START
RW
SUB-ADDR
ACK
DEV-ADDR
ACK
SEQUENTIAL
RANDOM
READ
DATA
ACK
START
RW
DATA
ACK
NO ACK
STOP
DATA
RW=
HIGH



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