参数资料
型号: TAS3004PFBRG4
厂商: TEXAS INSTRUMENTS INC
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封装: GREEN, PLASTIC, TQFP-48
文件页数: 38/84页
文件大小: 671K
代理商: TAS3004PFBRG4
6–4
Table 6–3 gives typical values of the wait states that can be expected with the various functions of the part:
Table 6–3. I2C Wait States
SYSTEM SAMPLING FREQUENCY
32 kHz
44.1 kHz
48 kHz
Comment
Volume
62 ms
49 ms
41 ms
Not dependent on size of change
Bass
231 ms
167 ms
153 ms
0 to –18 dB, –1 dB = 0.055 T @ fS
Treble
231 ms
167 ms
153 ms
0 to –18 dB, –1 dB = 0.055 T @ fS
DRC On
300
s
300
s
300
s
Mixer
None
Loudness
None
Equalization
15 ms
190
s
300
s
Can occur with each filter
6.4
SMBus Operation
The TAS3004 device supports a subset of the SMBus protocol. With proper programming techniques, it is possible
to use the SMBus to set up the TAS3004 device.
6.4.1
Block Write Protocol
The TAS3004 device supports the block write protocol that allows up to 32 bytes to be sent as a block. To send a
command using this format, the most significant bit (MSB) of the TAS3004 subaddress must be set high and the
subaddress (also with MSB set high) must be programmed into the SMBus command byte. This operation signals
the TAS3004 device to realize that the next byte is the SMBus byte count byte. The next byte after the byte count is
then entered into the device as the first byte of data.
SMBus
Command Byte
68h
8rh
xx
dd
TAS3004
Address
Subaddress
(r = subaddress)
Byte Count
(Don’t Care)
Data
6.4.2
Write Byte Protocol
The TAS3004 device also supports the SMBus write byte protocol. Writing to the main control register (MCR), bass,
and treble registers require using the byte write protocol. To send a command using this format, the most significant
bit (MSB) of the TAS3004 subaddress must be set high and the subaddress (also with MSB set high) must be
programmed into the SMBus command byte. The next byte after the command byte is then entered into the device
as the first byte of data.
SMBus
Command Byte
68h
8rh
dd
TAS3004
Address
Subaddress
(r = subaddress)
Data
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