參數(shù)資料
型號: PCM1870RHFR
英文描述: 16-Bit Low-Power Stereo Audio ADC With Microphone Bias and Microphone Amplifier
中文描述: 16位低功耗立體聲音頻ADC,具有麥克風(fēng)偏置和麥克風(fēng)放大器
文件頁數(shù): 22/49頁
文件大小: 648K
代理商: PCM1870RHFR
www.ti.com
Transmitter
M
M
Data Type
Slave Address
Reg Address
Write Data
R0002-01
M: Master Device S: Slave Device
St: Start Condition W: Write ACK: Acknowledge Sp: Stop Condition
M
M
S
M
St
W
ACK
Sp
S
ACK
M
S
ACK
R0002-02
M: Master Device S: Slave Device
St: Start Condition
Sr: Repeated Start Condition ACK: Acknowledge Sp: Stop Condition NACK: Not Acknowledge
W: Write R: Read
Transmitter
M
M
M
S
Data Type
St
Slave Address
W
ACK
M
Reg Address
M
Sr
M
Slave Address
S
ACK
M
R
S
ACK
M
Sp
M
NACK
S
Read Data
PCM1870
SLAS544–MAY 2007
Write Operation
A master can write any PCM1870 registers using single access. The master sends a PCM1870 slave address
with a write bit, a register address, and the data. When undefined registers are accessed, the PCM1870 does
not send an acknowledgement. The
Figure 21
shows a diagram of the write operation.
Figure 21. Framework for Write Operation
Read Operation
A master can read the PCM1870 register. The value of the register address is stored in an indirect index register
in advance. The master sends a PCM1870 slave address with a read bit after storing the register address. Then
the PCM1870 transfers the data which the index register points to.
Figure 22
shows a diagram of the read
operation.
NOTE: The slave address after the repeated start condition must be the same as the previous slave address.
Figure 22. Read Operation
22
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