PCM3793RHB BURR-BROWN [Burr-Brown Corporation], PCM3793RHB Datasheet - Page 27

• Manufacturer Part Number: PCM3793RHB
• Description: 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

Packet Protocol
The master device must control packet protocol, which consists of start condition, slave address with read/write
bit, data if write or acknowledgement if read, and stop condition. The PCM3793/94 supports only slave receiver
and slave transmitter.
WRITE OPERATION
A master can write any PCM3793/94 registers using single access. The master sends a PCM3793/94 slave
address with a write bit, a register address, and the data. When undefined registers are accessed, the
PCM3793/94 does not send an acknowledgement.
READ OPERATION
A master can read the PCM3793/94 register. The value of the register address is stored in an indirect index
register in advance. The master sends a PCM3793/94 slave address with a read bit after storing the register
address. Then the PCM3793/94 transfers the data which the index register points to.
of the write operation.
Write Operation
Read Operation
Transmitter
Transmitter
Transmitter
Data Type
Data Type
Data Type
www.ti.com
SDA
SCL
Condition
M: Master Device S: Slave Device
St: Start Condition W: Write ACK: Acknowledge Sp: Stop Condition
M: Master Device
St: Start Condition
Start
St
St
M
St
St
M
M
Slave Address
Slave Address
1−7
Slave Address
Slave Address
M
S: Slave Device
Sp: Stop Condition
M
M
R/W:
ACK: Acknowledgement of a Byte if 0
DATA: 8 Bits (Byte)
Figure 33. Framework for Write Operation
R/W
8
W
Figure 32. Basic I
M
Read Operation if 1; Otherwise, Write Operation
ACK
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9
R/W
R/W
ACK
M
M
S
Figure 33
DATA
ACK
ACK
1−8
S
S
Reg Address
2
C Framework
M
shows a diagram of the write operation.
ACK
DATA
DATA
9
M
S
SLES193A – AUGUST 2006 – REVISED SEPTEMBER 2006
ACK
S
DATA
1−8
ACK
ACK
M
S
Write Data
ACK
M
9
Figure 34
DATA
DATA
M
S
Condition
Stop
Sp
shows a diagram
ACK
S
NACK
ACK
M
S
PCM3793
PCM3794
Sp
M
R0002-01
Sp
Sp
T0049-03
M
M
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