參數(shù)資料
型號(hào): TAS5086DBT
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費(fèi)家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PDSO38
封裝: GREEN, TSSOP-38
文件頁(yè)數(shù): 17/47頁(yè)
文件大?。?/td> 814K
代理商: TAS5086DBT
A6
A5
A4
A3
A2
A1
A0
R/W ACK A7
A6
A5
A4
A3
A2
A1
A0
ACK
D7
D6
D5
D4
D3
D2
D1
D0 ACK
Start
Condition
Stop
Condition
Acknowledge
I CDevice Addressand
2
Read/WriteBit
Subaddress
DataByte
T0036-01
MULTIPLE-BYTE WRITE AND INCREMENTAL MULTIPLE-BYTE WRITE
D7
D0 ACK
Stop
Condition
Acknowledge
I CDevice Addressand
2
Read/WriteBit
Subaddress
LastDataByte
A6
A5
A1
A0 R/W ACK A7
A5
A1
A0
ACK D7
ACK
Start
Condition
Acknowledge
FirstDataByte
A4
A3
A6
OtherDataBytes
ACK
Acknowledge
D0
D7
D0
T0036-02
SINGLE-BYTE READ
SLES131C – FEBRUARY 2005 – REVISED JUNE 2008 ................................................................................................................................................... www.ti.com
Figure 23. Single-Byte Write Transfer
A multiple-byte data write transfer is identical to a single-byte data write transfer, except that multiple data bytes
are transmitted by the master device to TAS5086 as shown in Figure 24. After receiving each data byte, the
TAS5086 responds with an acknowledge bit.
Figure 24. Multiple-Byte Write Transfer
The I2C supports a special mode that permits I2C write operations to be broken up into multiple data write
operations that are multiples of 4 data bytes. These are 6-, 10-, 14-, 18-, ..., etc., -byte write operations that are
composed of a device address, read/write bit, and subaddress and any multiple of 4 bytes of data. This permits
the system to write large register values incrementally without blocking other I2C transactions.
This feature is enabled by the append subaddress (0xFE) in the TAS5086. The append address, 0xFE, enables
the TAS5086 to append an integer number of 4-, 8-, 12-, 16-, … byte blocks of data to a register that was
opened by a previous I2C register write operation, but has not received its complete number of data bytes.
When the correct number of bytes has been received, the TAS5086 starts processing the data.
The procedure to perform a multiple-byte write operation is as follows.
1. Start a normal I2C write operation by sending the device address, write bit, register subaddress, and an
integer number of 4-byte data blocks. At the end of that sequence, a stop condition is sent.
At this point the register has been opened. It then accepts the remaining data sent by one or more write
operations, consisting of an integer number of 4-byte blocks. This data should be written to the append
subaddress (0xFE).
2. At a later time, one or more append data transfers are performed to incrementally transfer the remaining
number of bytes in sequential order to complete the register write operation. Each of these append
operations is composed of the device address, write bit, append subaddress (0xFE), and an integer number
of four bytes of data, followed by a stop condition.
3. The operation is terminated due to an error condition, and the data is flushed:
If a new subaddress is written to the TAS5086 before the correct number of bytes has been written
If a noninteger number of 4 bytes is written at the beginning or during any of the append operations
If a read bit is sent
As shown in Figure 25, a single-byte data read transfer begins with the master device transmitting a start
condition, followed by the I2C device address and the read/write bit. For the data read transfer, both a write
followed by a read are actually done. Initially, a write is done to transfer the address byte or bytes of the internal
24
Copyright 2005–2008, Texas Instruments Incorporated
Product Folder Link(s): TAS5086
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