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参数资料
| 型号： | TAS5504PAGG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 13/96页 |
| 文件大小： | 1216K |
| 代理商： | TAS5504PAGG4 |
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Introduction
12
SLES123 October 2004
TAS5504
7 Biquads
in Series
Bass and
Treble
Loudness
DRC
Input Mixer
1 Other
Channel Output
From 7 Available
32-Bit
Trunc
PWM
Proc
Volume
A_to_ipmix
B_to_ipmix
A
SDIN1
B
C_to_ipmix
D_to_ipmix
C
SDIN2
D
E_to_ipmix
F_to_ipmix
E
SDIN3
F
G_to_ipmix
H_to_ipmix
G
SDIN4
H
Max
Volume
Left
Right
Channel
Volume
Master
Volume
Bass and Treble
Bypass
Bass and Treble
In-Line
Pre-
Volume
Post-
Volume
DRC
In-Line
DRC
Bypass
Output
Gain
Output Mixer Sums
Any Two Channels
PWM
Output
Figure 14. TAS5504 Detailed Channel Processing
1.4.2 I2C Coefficient Number Formats
The architecture of the TAS5504 is contained in ROM resources within the TAS5504 and cannot be altered.
However, mixer gain, level offset, and filter tap coefficients, which can be entered via the I2C bus interface,
provide a user with the flexibility to set the TAS5504 to a configuration that achieves the system level goals.
The firmware is executed in a 48-bit signed fixed-point arithmetic machine. The most significant bit of the 48-bit
data path is a sign bit, and the 47 lower bits are data bits. Mixer gain operations are implemented by multiplying
a 48-bit signed data value by a 28-bit signed gain coefficient. The 76-bit signed output product is then truncated
to a signed 48-bit number. Level offset operations are implemented by adding a 48-bit signed offset coefficient
to a 48-bit signed data value. In most cases, if the addition results in overflowing the 48-bit signed number
format, saturation logic is used. This means that if the summation results in a positive number that is greater
than 0x7FFF_FFFF_FFFF (the spaces are used to ease the reading of the hexadecimal number), the number
is set to 0x7FFF_FFFF_FFFF. If the summation results in a negative number that is less than
0x8000_0000_0000 0000, the number is set to 0x8000_0000_0000 0000.
1.4.2.1
28-Bit 5.23 Number Format
All mixer gain coefficients are 28-bit coefficients using a 5.23 number format. Numbers formatted as 5.23
numbers means that there are 5 bits to the left of the decimal point and 23 bits to the right of the decimal point.
This is shown in the Figure 15.
223 Bit
S_xxxx.xxxx_xxxx_xxxx_xxxx_xxx
24 Bit
21 Bit
20 Bit
Sign Bit
23 Bit
Figure 15. 5.23 Format
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相关代理商/技术参数 |
参数描述 |
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| TAS5504PAGR | 功能描述:音频 DSP 4 Ch Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS5504PAGRG4 | 功能描述:音频 DSP 4 Ch Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS5508 | 制造商:TI 制造商全称:Texas Instruments 功能描述:8 Channel Digital Audio PWM Processor |
| TAS5508-5121K8EVM | 功能描述:音频 IC 开发工具 TAS5508-TAS5121K8 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TAS5508-5122C6EVM | 功能描述:音频 IC 开发工具 TAS5508-5122C6 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
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