參數(shù)資料
型號： EVAL-ADAU1781Z
廠商： Analog Devices Inc
文件頁數(shù)： 28/92頁
文件大?。?/td> 0K
描述： BOARD EVAL FOR ADAU1781
標(biāo)準(zhǔn)包裝： 1
系列： SigmaDSP®
主要目的： 音頻編解碼器
嵌入式： 是，DSP
已用 IC / 零件： ADAU1781
主要屬性： 立體聲，24 位，8 ~ 96 kHz 采樣率，GUI 工具
次要屬性： *
已供物品： *
ADAU1781
Rev. B | Page 34 of 92
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 ADAU1781
immediately jumps to the idle condition. During a given SCL
high period, the user should issue only 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 ADAU1781 does not issue an acknowledge and returns to
the idle condition. If the user exceeds the highest subaddress while
in auto-increment mode, one of two actions is taken. In read mode,
the ADAU1781 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 ADAU1781, and the part returns
to the idle condition.
R/W
0
SCL
SDA
SCL
(CONTINUED)
SDA
(CONTINUED)
1
0
ADDR0
ADDR1
START BY
MASTER
FRAME 1
CHIP ADDRESS BYTE
FRAME 2
SUBADDRESS BYTE 1
FRAME 3
SUBADDRESS BYTE 2
FRAME 4
DATA BYTE 1
ACKNOWLEDGE
BY ADAU1781
ACKNOWLEDGE
BY ADAU1781
ACKNOWLEDGE
BY ADAU1781
ACKNOWLEDGE
BY ADAU1781
STOP BY
MASTER
08314-
036
Figure 37. I2C Write to ADAU1781 Clocking
SCL
SDA
SCL
(CONTINUED)
SDA
(CONTINUED)
SCL
(CONTINUED)
SDA
(CONTINUED)
START BY
MASTER
ACKNOWLEDGE
BY ADAU1781
ACKNOWLEDGE
BY ADAU1781
REPEATED
START BY MASTER
ACKNOWLEDGE
BY ADAU1781
ACKNOWLEDGE
BY ADAU1781
ACKNOWLEDGE
BY MASTER
STOP BY
MASTER
ACKNOWLEDGE
BY ADAU1781
0
1
0
ADDR0
ADDR1
0
1
0
ADDR0
ADDR1
FRAME 1
CHIP ADDRESS BYTE
FRAME 2
SUBADDRESS BYTE 1
FRAME 3
SUBADDRESS BYTE 2
FRAME 4
CHIP ADDRESS BYTE
FRAME 5
READ DATA BYTE 1
FRAME 6
READ DATA BYTE 2
R/W
08314-
037
Figure 38. I2C Read from ADAU1781 Clocking
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