參數資料
型號: ADAU1461WBCPZ
廠商: Analog Devices Inc
文件頁數: 31/88頁
文件大?。?/td> 0K
描述: IC SIGMADSP 24BIT 96KHZ PLL 32
標準包裝: 1
系列: SigmaDSP®
類型: 音頻處理器
應用: 車載音頻
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤,CSP
供應商設備封裝: 32-LFCSP-VQ
包裝: 托盤
ADAU1461
Rev. 0 | Page 37 of 88
The R/W bit determines the direction of the data. A Logic 0 on
the LSB of the first byte means that the master will write infor-
mation to the peripheral, whereas a Logic 1 means that the
master will read information from the peripheral after writing
the subaddress and repeating the start address. A data transfer
takes place until a stop condition is encountered. A stop
condition occurs when SDA transitions from low to high while
SCL is held high.
shows the timing of an I2C write,
and
shows an I2C read.
Stop and start conditions can be detected at any stage during the
data transfer. If these conditions are asserted out of sequence with
normal read and write operations, the ADAU1461 immediately
jumps to the idle condition. During a given SCL high period,
the user should only issue one start condition, one stop condition,
or a single stop condition followed by a single start condition. If
an invalid subaddress is issued by the user, the ADAU1461 does
not issue an acknowledge and returns to the idle condition.
If the user exceeds the highest subaddress while in autoincrement
mode, one of two actions is taken. In read mode, the ADAU1461
outputs the highest subaddress register contents until the master
device issues a no acknowledge, indicating the end of a read. A
no acknowledge condition is where the SDA line is not pulled
low on the ninth clock pulse on SCL. If the highest subaddress
location is reached while in write mode, the data for the invalid
byte is not loaded into any subaddress register, a no acknowledge
is issued by the ADAU1461, and the part returns to the idle
condition.
R/W
0
SCL
SDA
(CONTINUED)
SCL
(CONTINUED)
11
1
ADDR0
ADDR1
0
START BY
MASTER
FRAME 1
CHIP ADDRESS BYTE
FRAME 2
SUBADDRESS BYTE 1
FRAME 3
FRAME 4
ACK BY
ADAU1461
ACK BY
ADAU1461
ACK BY
ADAU1461
ACK BY
ADAU1461
STOP BY
MASTER
SUBADDRESS BYTE 2
DATA BYTE 1
08
914
-03
2
Figure 49. I2C Write to ADAU1461 Clocking
R/W
SCL
SDA
(CONTINUED)
SCL
(CONTINUED)
START BY
MASTER
FRAME 2
SUBADDRESS BYTE 1
FRAME 1
CHIP ADDRESS BYTE
ACK BY
ADAU1461
ACK BY
ADAU1461
ACK BY
ADAU1461
ACK BY
ADAU1461
REPEATED
START BY MASTER
SDA
(CONTINUED)
SCL
(CONTINUED)
FRAME 3
SUBADDRESS BYTE 2
FRAME 4
CHIP ADDRESS BYTE
FRAME 5
READ DATA BYTE 1
STOP BY
MASTER
ACK BY
MASTER
01
1
R/W
ADDR0
ADDR1
0
ADDR1
01
1
0
0
89
14
-03
3
Figure 50. I2C Read from ADAU1461 Clocking
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