- 您现在的位置：买卖IC网 > PDF目录2063 > ADAU1445YSVZ-3A-RL (Analog Devices Inc)IC SIGMADSP 175MHZ 100TQFP PDF资料下载
参数资料
| 型号： | ADAU1445YSVZ-3A-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 21/92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) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页当前第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页
ADAU1445/ADAU1446
Rev. A | Page 28 of 92
Self-Boot
On power-up, the ADAU1445/ADAU1446 can load a program
and a set of parameters that are saved in an external EEPROM.
Combined with the auxiliary ADC and the multipurpose pins,
this can potentially eliminate the need for a microcontroller in a
simple audio system. The self-boot sequence is accomplished by
the ADAU1445/ADAU1446 acting as masters on the I2C bus on
startup, which occurs when the SELFBOOT pin is set high. The
ADAU1445/ADAU1446 cannot self-boot in SPI mode.
The maximum necessary EEPROM size is 40,960 bytes, or
40 kB. This much memory is only needed if the program RAM
(4096 × 6 bytes) and parameter RAM (4096 × 4 bytes) are each
completely full.
A self-boot operation is triggered on the rising edge of RESET
when the SELFBOOT pin is set high, and it occurs after 10 ms
when the PLL has locked. The ADAU1445/ADAU1446 read the
program, parameter, and register data from the EEPROM. After
the ADAU1445/ADAU1446 have finished self-booting, additional
messages can be sent to the ADAU1445/ADAU1446 on the I2C
bus, although this typically is not necessary in a self-booting
application. The I2C device address for the ADAU1445/ADAU1446
is 0x68 for a write and 0x69 for a read in this mode. The ADDRx
pins have different functions when the chip is in this mode;
therefore, the settings on them are ignored.
The ADAU1445/ADAU1446 are masters on the I2C bus during
a self-boot operation. Care should be taken that no other device
on the I2C bus tries to perform a write operation during self-
booting. The ADAU1445/ADAU1446 generate SCL at 8 × fs;
therefore, when fs,NORMAL is 48 kHz, SCL runs at 384 kHz. SCL
has a duty cycle of in accordance with the I2C specification.
The ADAU1445/ADAU1446 read from EEPROM Chip Address
0xA1. The LSBs of the addresses of some EEPROMs are pin con-
figurable; in most cases, these pins should be tied low to set this
address. SigmaStudio writes to the EEPROM at Address 0xA0.
EEPROM Format
The EEPROM data contains a sequence of messages. Each
discrete message is one of the four types defined in Table 15.
Each message consists of a sequence of one or more bytes. The
first byte identifies the message type. Bytes are written MSB
first. Most messages are block write (0x01) types, which are
used for writing to the ADAU1445/ADAU1446 program RAM,
parameter RAM, and control registers.
The body of the message following the message type should
start with a byte indicating message length and then include a
byte indicating the chip address. Following this is always a
2-byte register or memory address field, as with all other
control port transactions.
SigmaStudio is capable of generating the EEPROM data necessary
to self-boot the ADAU1445/ADAU1446, using the function
called write latest compilation to E2PROM. This function can
be accessed by right-clicking the ADAU1445/ADAU1446 IC in
the hardware configuration window.
Table 14. Functions of the Control Port Pins
Pin
I2C Mode
SPI Mode
Self-Boot
SCL/CCLK
SCL—input
CCLK—input
SCL—output
SDA/COUT
SDA—open collector output
COUT—output
SDA—open collector output
ADDR1/CDATA
ADDR1—input
CDATA—input
Unused input—tie to ground or power
CLATCH
Unused input—tie to ground or power
CLATCH—input
Unused input—tie to ground or power
ADDR0
ADDR0—input
Unused input—tie to ground or power
Table 15. EEPROM Message Types
Message ID
Message Type
Following Bytes
0x00
End
None
0x01
Write
One byte indicating message length (including chip address and
subaddress), one byte indicating chip address, two bytes
indicating subaddress, and an appropriate number of data bytes
0x02
Delay
Two bytes for delay
0x03
No op
None
相关PDF资料 |
PDF描述 |
|---|---|
| ADAU1461WBCPZ-R7 | IC SIGMADSP 24BIT 96KHZ PLL 32 |
| ADAU1513ACPZ-RL7 | IC AMP AUDIO PWR 23W 48LFCSP |
| ADAU1590ACPZ-RL7 | IC AMP AUDIO PWR 48LFCSP |
| ADAU1592ACPZ | IC AMP AUDIO PWR 24W 48LFCSP |
| ADAU1701JSTZ-RL | IC AUDIO PROC 2ADC/4DAC 48-LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
发布紧急采购，3分钟左右您将得到回复。