參數(shù)資料
型號： ADAU1446YSTZ-3A-RL
廠商： Analog Devices Inc
文件頁數(shù)： 59/92頁
文件大小： 0K
描述： IC SIGMADSP 175MHZ 100LQFP
標準包裝： 1,000
系列： SigmaDSP®
類型： 音頻處理器
應(yīng)用： 車載音頻
安裝類型： 表面貼裝
封裝/外殼： 100-LQFP
供應(yīng)商設(shè)備封裝： 100-LQFP（16x16）
包裝： 帶卷 (TR)
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
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.
相關(guān)PDF資料
PDF描述
SP3243EUCA-L/TR IC TXRX RS232 INTELLIGENT 28SSOP
SP3232EUEA-L IC TXRX RS232 ESD 16SSOP
AD7856ARSZ-REEL7 IC ADC 14BIT 8CHAN 5V 24SSOP
VI-21J-IU-F3 CONVERTER MOD DC/DC 36V 200W
CS8416-CNZ IC RCVR DGTL 192KHZ 28QFN COMM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADAU1450WBCPZ 功能描述:IC AUDIO PROCESSOR 72LFCSP 制造商:analog devices inc. 系列:SigmaDSP? 包裝:托盤 零件狀態(tài):有效 類型:Sigma 接口:I2C，SPI 時鐘速率:147.456MHz 非易失性存儲器:- 片載 RAM:64KB 電壓 - I/O:3.3V 電壓 - 內(nèi)核:1.20V 工作溫度:-40°C ~ 105°C（TA） 安裝類型:表面貼裝 封裝/外殼:72-VFQFN 裸露焊盤，CSP 供應(yīng)商器件封裝:72-LFCSP-VQ（10x10） 標準包裝:1
ADAU1450WBCPZ-RL 功能描述:IC AUDIO PROCESSOR 72LFCSP 制造商:analog devices inc. 系列:SigmaDSP? 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:Sigma 接口:I2C，SPI 時鐘速率:147.456MHz 非易失性存儲器:- 片載 RAM:64KB 電壓 - I/O:3.30V 電壓 - 內(nèi)核:1.20V 工作溫度:-40°C ~ 105°C（TA） 安裝類型:表面貼裝 封裝/外殼:72-VFQFN 裸露焊盤，CSP 供應(yīng)商器件封裝:72-LFCSP-VQ（10x10） 標準包裝:1
ADAU1451WBCPZ 功能描述:IC AUDIO PROCESSOR 72LFCSP 制造商:analog devices inc. 系列:SigmaDSP? 包裝:托盤 零件狀態(tài):有效 類型:Sigma 接口:I2C，SPI 時鐘速率:294.912MHz 非易失性存儲器:- 片載 RAM:96kB 電壓 - I/O:3.3V 電壓 - 內(nèi)核:1.20V 工作溫度:-40°C ~ 105°C（TA） 安裝類型:表面貼裝 封裝/外殼:72-VFQFN 裸露焊盤，CSP 供應(yīng)商器件封裝:72-LFCSP-VQ（10x10） 標準包裝:1
ADAU1451WBCPZ-RL 功能描述:IC AUDIO PROCESSOR 72LFCSP 制造商:analog devices inc. 系列:SigmaDSP? 包裝:剪切帶（CT） 零件狀態(tài):在售 類型:Sigma 接口:I2C，SPI 時鐘速率:294.912MHz 非易失性存儲器:- 片載 RAM:96kB 電壓 - I/O:3.30V 電壓 - 內(nèi)核:1.20V 工作溫度:-40°C ~ 105°C（TA） 安裝類型:表面貼裝 封裝/外殼:72-VFQFN 裸露焊盤，CSP 供應(yīng)商器件封裝:72-LFCSP-VQ（10x10） 標準包裝:1
ADAU1452WBCPZ 功能描述:IC AUDIO PROCESSOR 72LFCSP 制造商:analog devices inc. 系列:SigmaDSP? 包裝:托盤 零件狀態(tài):有效 類型:Sigma 接口:I2C，SPI 時鐘速率:294.912MHz 非易失性存儲器:- 片載 RAM:192kB 電壓 - I/O:3.3V 電壓 - 內(nèi)核:1.20V 工作溫度:-40°C ~ 105°C（TA） 安裝類型:表面貼裝 封裝/外殼:72-VFQFN 裸露焊盤，CSP 供應(yīng)商器件封裝:72-LFCSP-VQ（10x10） 標準包裝:1
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*