TAS5754M Datasheet, PDF (57/127 Pages) Texas Instruments – Digital Input, Closed-Loop Class-D Amplifier

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TAS5754M
SLAS987 – JUNE 2014
8.3.8.2 Register Address Auto-Increment Mode
MSB
LSB
INC
A6
A5
A4
A3
A2
A1
A0
Figure 76. Auto Increment Mode
Auto-increment mode allows multiple sequential register locations to be written to or read back in a single
operation, and is especially useful for block write and read operations.
8.3.8.3 Packet Protocol
A master device must control packet protocol, which consists of start condition, slave address, read/write bit,
data if write or acknowledge if read, and stop condition. The TAS5754M device supports only slave receivers and
slave transmitters.
SDA
SCL
St
1–7
Slave address
8
R/W
9
ACK
1–8
DATA
9
ACK
1–8
DATA
9
ACK
Start
condition
R/W: Read operation if 1; otherwise, write operation
ACK: Acknowledgement of a byte if 0
DATA: 8 bits (byte)
Figure 77. Packet Protocol
9
ACK
Sp
Stop
condition
Transmitter
Data Type
Table 18. Write Operation - Basic I²C Framework
M
M
M
S
M
S
M
S
St
slave address
R/
ACK DATA ACK DATA ACK
S
M
ACK
Sp
Transmitter
Data Type
Table 19. Read Operation - Basic I²C Framework
M
M
M
S
S
M
S
M
St
slave address
R/
ACK DATA ACK DATA ACK
M = Master Device; S = Slave Device; St = Start Condition Sp = Stop Condition
M
M
NACK Sp
8.3.8.4 Write Register
A master can write to any TAS5754M device registers using single or multiple accesses. The master sends a
TAS5754M device slave address with a write bit, a register address with auto-increment bit, and the data. If auto-
increment is enabled, the address is that of the starting register, followed by the data to be transferred. When the
data is received properly, the index register is incremented by 1 automatically. When the index register reaches
0x7F, the next value is 0x0. Table 20 shows the write operation.
Transmitter
M
Data Type
St
M
slave addr
Table 20. Write Operation
M
S
M
S
M
S
M
S
W
ACK
inc
reg
addr
ACK
write
data 1
ACK
write
data 2
ACK
S
M
ACK Sp
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