- 您现在的位置：买卖IC网 > Sheet目录1201 > CDB8422 (Cirrus Logic Inc)BOARD EVAL FOR CS8422 RCVR
CDB8422
1. SYSTEM OVERVIEW
The CDB8422 platform provides S/PDIF and AES3/EBU digital interfaces to the CS8422 and allows for external
DSP and I2C ? or SPI TM control port interconnects. On-board voltage regulators are provided so that a single external
power supply of +5 V can be used to provide power for the CDB8422. Optionally, the evaluation board may be pow-
ered from a USB connection, which also serves as an interface to a PC. The CDB8422 is configured in software
mode using Cirrus Logic’s Windows-compatible FlexGUI software to read/write to device registers. In hardware
mode, the evaluation board is configured using several DIP switches.
This section describes the various components on the CDB8422 and how they are used. The two following sections
( Section 2 and Section 3 ) provide details on operating the CDB8422 in software and hardware mode, respectively.
Both sections begin with a simplified quick connect guide provided for user convenience which can be used to set
up the board quickly with the CS8422 in its startup default configuration. Next, descriptions are given for several
useful configuration options in which the board can be used. Then, complete configuration details for each mode
are described. Section 4 , Section 5 , and Section 6 provide a description of all stake headers, connectors, and LEDs
on the board, including the default factory settings for all jumpers. The CDB8422 schematic and layout set is shown
1.1
1.2
1.3
1.4
4
Power
Power and ground is supplied to the evaluation board via binding posts J2 and J3 (respectively) or the USB
connection J37. Jumper J20 allows the user to select the power source (see Section 5 for details). The volt-
age connected to the binding posts should be +5 V. An on-board voltage regulator provides +3.3 V for the
CS8422’s VA, VL, and V_REG supplies. All voltage inputs are referenced to ground using the black binding
post J3.
Grounding and Power Supply Decoupling
The CDB8422 demonstrates the optimal power supply and grounding arrangements for the CS8422.
Figure 14 provides an overview of the connections to the CS8422. Figure 27 shows the component place-
ment, Figure 28 shows the top layout, and Figure 29 shows the bottom layout. Power supply decoupling ca-
pacitors are located as close as possible to the CS8422. Extensive use of ground plane fill helps reduce
radiated noise.
FPGA
The FPGA controls digital signal routing between the CS8422, the CS8406, and the I/O stake headers. It
also provides routing control of the system master clock from an on-board canned oscillator, an on-board
crystal oscillator, and the CS8422. The FPGA configures the CDB8422 in hardware mode and routes serial
control signals from the micro controller to the CS8422 in software mode. The Cirrus FlexGUI software pro-
vides full control of the FPGA’s routing and configuration options, see Section 2.3 , Section 2.4 , and Section
2.5 for details. A subset of the FPGA’s options are accessible in hardware mode using DIP switches, see
CS8422
A complete description of the CS8422 can be found in the CS8422 product data sheet.
When the evaluation board is connected to a PC via the USB connector, the CS8422 is placed in software
mode and is configured using the Cirrus FlexGUI. The device configuration registers are accessible via the
“Register Maps” tab of the Cirrus FlexGUI software. This tab provides low-level control of each bit. For eas-
ier configuration, additional tabs provide high-level control. Section 2.3 provides configuration details.
DS692DB2
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
CDB8952T
BOARD EVAL FOR CS8952
CDCE906-706PERFEVM
EVAL MOD PERFORMANCE CDCE906/706
CEVAL-033
BOARD EVAL FOR CVCO33 .3"X.3"
CF37S
COVER FLANGE 37POS FEMALE
CG0402MLC-05LG
SUPPRESSOR ESD 5VDC 0402 SMD
CG0402MLU-24G
SUPPRESSOR ESD 24VDC 0402 SMD
CG0603MLA-26KE
CHIP GUARD
CG0603MLD-12E
VARISTOR 12VDC 1CH 0603 SMD
相关代理商/技术参数
CDB8427
功能描述:音频 IC 开发工具 Eval Bd 96kHz Dig. Audio Transcvr 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
CDB8952
制造商:Cirrus Logic 功能描述:NOT RECOMMENDED FOR NEW DESIGNS - USE CDB8952T - Bulk 制造商:Cirrus Logic 功能描述:Tools Development kit Kit Con
CDB8952T
功能描述:以太网开发工具 Eval Bd 100BASE-TX/ 10BASE-T Transceiver
RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压:
CDB-9PF
制造商:HRS 制造商全称:HRS 功能描述:CD CRIMP TYPE CONNECTOR
CDB-9SF
制造商:HRS 制造商全称:HRS 功能描述:CD CRIMP TYPE CONNECTOR
CDBA1100
制造商:COMCHIP 制造商全称:Comchip Technology 功能描述:SMD Schottky Barrier Rectifier
CDBA1100-G
功能描述:肖特基二极管与整流器 SCHOTTKY DIODE 1A, 100V RoHS:否 制造商:Skyworks Solutions, Inc. 产品:Schottky Diodes 峰值反向电压:2 V 正向连续电流:50 mA 最大浪涌电流: 配置:Crossover Quad 恢复时间: 正向电压下降:370 mV 最大反向漏泄电流: 最大功率耗散:75 mW 工作温度范围:- 65 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:SOT-143 封装:Reel
CDBA1100GS
制造商:COMCHIP 制造商全称:Comchip Technology 功能描述:SMD Schottky Barrier Rectifier