- 您现在的位置：买卖IC网 > PDF目录16522 > EVAL-ADAU1781Z (Analog Devices Inc)BOARD EVAL FOR ADAU1781 PDF资料下载
参数资料
| 型号： | EVAL-ADAU1781Z |
| 厂商： | Analog Devices Inc |
| 文件页数： | 18/92页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADAU1781 |
| 标准包装： | 1 |
| 系列： | SigmaDSP® |
| 主要目的： | 音频编解码器 |
| 嵌入式： | 是，DSP |
| 已用 IC / 零件： | ADAU1781 |
| 主要属性： | 立体声，24 位，8 ~ 96 kHz 采样率，GUI 工具 |
| 次要属性： | * |
| 已供物品： | * |
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页当前第18页第19页第20页第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
ADAU1781
Rev. B| Page 25 of 92
STARTUP, INITIALIZATION, AND POWER
This section details the procedure for setting up the ADAU1781
properly. Figure 26 provides an overview of how to initialize the IC.
START
CONFIGURE CLOCK GENERATION
REGISTER 16384 (0x4000)
AND REGISTER 16386 (0x4002)
SUPPLY POWER TO AVDD1/AVDD2
PINS SIMULTANEOUSLY
DOWNLOAD PROGRAM RAM,
PARAMETER RAM, AND
REGISTER CONTENTS
INITIALIZATION
COMPLETE
WAIT 14ms FOR POWER-ON RESET
AND INITIALIZATION ROM BOOT
SUPPLY POWER TO IOVDD
ENABLE DIGITAL POWER TO
FUNCTIONAL SUBSYSTEMS
REGISTER 16512 (0x4080)
AND REGISTER 16513 (0x4081)
WAIT FOR PLL LOCK
(2.4ms TO 3.5ms)
ARE AVDD1 AND AVDD2
SUPPLIED SEPARATELY?
CAN AVDD1 AND AVDD2
BE SIMULTANEOUSLY
SUPPLIED?
SUPPLY POWER
TO AVDD2
SUPPLY POWER
TO AVDD1
NO
YES
NO
08314-
025
Figure 26. Initialization Sequence
POWER-UP SEQUENCE
If AVDD1 and AVDD2 are from the same supply, they can
power up simultaneously. If AVDD1 and AVDD2 are from
separate supplies, then AVDD1 should be powered up first.
IOVDD should be applied simultaneously with AVDD1, if
possible.
The ADAU1781 uses a power-on reset (POR) circuit to reset the
registers upon power-up. The POR monitors the DVDDOUT
pin and generates a reset signal whenever power is applied to
the chip. During the reset, the ADAU1781 is set to the default
values documented in the register map (see the Control Register
Map section).
The POR is also used to prevent clicks and pops on the speaker
driver output. The power-up sequencing and timing involved is
described in Figure 27 in this section, and in Figure 35 and
Figure 36 of the Speaker Output section.
A self-boot ROM initializes the memories after the POR has
completed. When the self-boot sequence is complete, the control
registers are accessible via the I2C/SPI control port and should
then be configured as required for the application. Typically,
with a 10 μF capacitor on AVDD1, the power supply ramp-up,
POR, and self-boot combined take approximately 14 ms.
AVDD1
AVDD2
DVDDOUT
POWER-UP
(INTERNAL
SIGNAL)
INTERNAL MCLK
(NOT TO SCALE)
IOVDD
INPUT/OUTPUT
PINS
ACTIVE
1.35V
1.5V
0.95V
MAIN SUPPLY ENABLED
POR
ACTIVE
1.5V
MAIN SUPPLY DISABLED
14ms
HIGH-Z
POR COMPLETE/SELF-BOOT INITIATES
SELF-BOOT COMPLETE/MEMORY
IS ACCESSIBLE
POR ACTIVATES
08314-
026
Figure 27. Power-Up and Power-Down Sequence Timing Diagram
相关PDF资料 |
PDF描述 |
|---|---|
| MCP1316T-46BE/OT | IC SPRVSR SMPL RSET 4.6V SOT23-5 |
| EBM28DTBN-S189 | CONN EDGECARD 56POS R/A .156 SLD |
| 6374110-4 | C/A SM, LC TO LC 4METER |
| EBM28DTBH-S189 | CONN EDGECARD 56POS R/A .156 SLD |
| VI-J0F-EZ-S | CONVERTER MOD DC/DC 72V 25W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EVAL-ADAU1962AZ | 制造商:Analog Devices 功能描述:EVAL BOARD FOR ADAU1962A - Boxed Product (Development Kits) 制造商:Analog Devices 功能描述:Eval Board for ADAU1962A |
| EVAL-ADAU1966AZ | 制造商:Analog Devices 功能描述:EVAL BOARD FOR ADAU1962A - Boxed Product (Development Kits) |
| EVAL-ADAU1966Z | 功能描述:BOARD EVAL FOR ADAU1966 RoHS:是 类别:编程器，开发系统 >> 评估板 - 数模转换器 (DAC) 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- DAC 的数量:4 位数:12 采样率（每秒）:- 数据接口:串行，SPI? 设置时间:3µs DAC 型:电流/电压 工作温度:-40°C ~ 85°C 已供物品:板 已用 IC / 零件:MAX5581 |
| EVAL-ADAU1966Z | 制造商:Analog Devices 功能描述:ADAU1966, DAC, SIGMA DELTA, SPI, I2C, EV |
| EVAL-ADAU1978Z | 制造商:AD 制造商全称:Analog Devices 功能描述:Quad Analog-to-Digital Converter (ADC) |
发布紧急采购，3分钟左右您将得到回复。