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| 型号： | ADAU1445YSVZ-3A-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 59/92页 |
| 文件大小： | 0K |
| 描述： | IC SIGMADSP 175MHZ 100TQFP |
| 标准包装： | 1,000 |
| 系列： | SigmaDSP® |
| 类型： | 音频处理器 |
| 应用： | 车载音频 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-TQFP 裸露焊盘 |
| 供应商设备封装： | 100-TQFP-EP（14x14） |
| 包装： | 带卷 (TR) |
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ADAU1445/ADAU1446
Rev. A | Page 62 of 92
RAMS
The ADAU1445/ADAU1446 have 4k words of program RAM,
4k words of parameter RAM, and 8k words of data RAM.
Program RAM
Table 46. Register Details of Program RAM
Address
Name
Read/Write
Word Length
Decimal
Hex
8192
2000
Program RAM
43 bits (6 bytes)
The program RAM contains the 43-bit operation codes that are
executed by the core. It is important to note that although the
length of the RAM is 4096, only 3584 instructions can be
executed in the span of a single frame for normal rate signals.
For dual-rate processing, the maximum allowable instruction
count is 1792, and for quad-rate processing, the maximum
allowable instruction count is 896. For more information on
setting the DSP core rate, see the DSP Core Rate Select Register
(Address 0xE220) section.
The additional program space can be used with optimized
algorithms and jump commands. The SigmaStudio compiler
calculates maximum instructions per frame for a project and
generates an error when the value exceeds the maximum allowable
instructions per frame based on the sample rate of the signals in
the core.
Because the end of a program contains a jump-to-start command,
the remaining program RAM space does not need to be filled
with no-operation (NOP) commands.
Program Counter Peak Count Register (Address 0xE229)
Table 47. Bit Descriptions of Register 0xE229
Bit Position
Description
[15:0]
Program counter peak count (read only)
This 16-bit, read-only register keeps track of how many cycles
elapse from the start of the program until the program counter
is reset. The register is updated on every start pulse.
This register should not be used if the watchdog error sticky bit
has been activated, which indicates that the maximum allowable
clock cycles per frame have been exceeded. In this case, the
program counter peak value may be inaccurate.
Parameter RAM
Table 48. Register Details of Parameter RAM
Address
Name
Read/Write
Word Length
Decimal
Hex
0
0000
Parameter RAM
28 bits (4 bytes)
The parameter RAM contains all 28-bit values that are used by
algorithms running in the DSP core. SigmaStudio automatically
assigns the first eight positions to safeload parameters; therefore,
project-specific parameters start at Address 0x0008.
Data RAM
Table 49. Register Details of Data RAM
Address
Name
Read/Write
Word Length
Decimal
Hex
16384
4000
Data RAM
28 bits (4 bytes)
The data RAM stores audio data that must be accessed by the
core for more than one frame. Unlike previous generations of
SigmaDSP architectures, which used a hardware-based modulo
structure, the ADAU1445/ADAU1446 have a software-based
modulo scheme that is controlled by the programmer.
The data RAM should be initialized to all 0s before a boot-up
operation is performed to avoid an undefined startup state.
SigmaStudio inserts the appropriate data RAM initialization
code into projects by default.
Modulo Data Memory Register (Address 0xE21F)
Table 50. Bit Descriptions of Register 0xE21F
Bit
Position
Description
Default
[15:14]
Reserved.
[13:0]
Nonmodulo data memory start.
The setting is the address in
memory.
01111100000000
This is a single 14-bit register that sets the start of the
nonmodulo space of the data memory. The default value is
7936 decimal. SigmaStudio sets this value by default based on
the addressing scheme used in the SigmaStudio project. The
value should not be modified by the user.
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相关代理商/技术参数 |
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| ADAU1446EBZ | 制造商:Analog Devices 功能描述:SIGMADSP? DIGITAL AUDIO PROCESSOR WITH FLEXIBLE AUDIO - Bulk |
| ADAU1446YSTZ-3A | 功能描述:IC SIGMADSP 175MHZ 100LQFP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:SigmaDSP® 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP（10x10） 包装:Digi-Reel® 其它名称:497-11050-6 |
| ADAU1446YSTZ-3A-RL | 功能描述:IC SIGMADSP 175MHZ 100LQFP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:SigmaDSP® 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP（10x10） 包装:Digi-Reel® 其它名称:497-11050-6 |
| ADAU1450WBCPZ | 功能描述:IC AUDIO PROCESSOR 72LFCSP 制造商:analog devices inc. 系列:SigmaDSP? 包装:托盘 零件状态:有效 类型:Sigma 接口:I2C，SPI 时钟速率:147.456MHz 非易失性存储器:- 片载 RAM:64KB 电压 - I/O:3.3V 电压 - 内核:1.20V 工作温度:-40°C ~ 105°C（TA） 安装类型:表面贴装 封装/外壳:72-VFQFN 裸露焊盘，CSP 供应商器件封装:72-LFCSP-VQ（10x10） 标准包装:1 |
| ADAU1450WBCPZ-RL | 功能描述:IC AUDIO PROCESSOR 72LFCSP 制造商:analog devices inc. 系列:SigmaDSP? 包装:剪切带（CT） 零件状态:在售 类型:Sigma 接口:I2C，SPI 时钟速率:147.456MHz 非易失性存储器:- 片载 RAM:64KB 电压 - I/O:3.30V 电压 - 内核:1.20V 工作温度:-40°C ~ 105°C（TA） 安装类型:表面贴装 封装/外壳:72-VFQFN 裸露焊盘，CSP 供应商器件封装:72-LFCSP-VQ（10x10） 标准包装:1 |
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