"Preliminary" product information describes products that are in production, but for which full characterization data is not yet available. "Advance" product infor-
mation describes products that are in development and subject to development changes. Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the infor-
mation contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty
of any kind (express or implied). Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being
relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those
pertaining to warranty, patent infringement, and limitation of liability. No responsibility is assumed by Cirrus for the use of this information, including use of this
information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. This document is the property of Cirrus
and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or
other intellectual property rights. Cirrus owns the copyrights of the information contained herein and gives consent for copies to be made of the information only
for use within your organization with respect to Cirrus integrated circuits or other parts of Cirrus. This consent does not extend to other copying such as copying
for general distribution, advertising or promotional purposes, or for creating any work for resale.
An export permit needs to be obtained from the competent authorities of the Japanese Government if any of the products or technologies described in this ma-
terial and controlled under the "Foreign Exchange and Foreign Trade Law" is to be exported or taken out of Japan. An export license and/or quota needs to be
obtained from the competent authorities of the Chinese Government if any of the products or technologies described in this material is subject to the PRC Foreign
Trade Law and is to be exported or taken out of the PRC.
CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE
PROPERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANT-
ED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS
IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK.
Cirrus Logic, Cirrus, and the Cirrus Logic logo designs are trademarks of Cirrus Logic, Inc. All other brand and product names in this document may be trade-
marks or service marks of their respective owners.
2
DS479DB2
CDB43L43
Figure 18.FFT of 1 kHz Sine Wave at 3.0 V ...................................................... 18
Figure 19.Silkscreen Top ................................................................................... 19
Figure 20.Bottom Side ....................................................................................... 20
Figure 21.Top Side ............................................................................................. 21
DS479DB2
3
CDB43L43
1. CDB43L43 SYSTEM OVERVIEW
The CDB43L43 evaluation board is an excellent
means of quickly evaluating the CS43L43. The
CS8415A digital audio interface receiver provides
an easy interface to digital audio signal sources in-
cluding the majority of digital audio test equip-
ment. The evaluation board also allows the user to
supply clocks and data through a 10-pin header for
system development.
The CDB43L43 schematic has been partitioned
into 10 schematics shown in Figures 2 through 11.
Each partitioned schematic is represented in the
system diagram shown in Figure 1. Notice that the
the system diagram also includes the interconnec-
tions between the partitioned schematics.
5. HEADPHONE OUTPUT
A 1/8 inch, stereo headphone jack is included on
the evaluation board for connecting 16 ohm or
greater headphones to the CS43L43. If no head-
phones are connected to the 1/8 inch jack, then a 16
ohm resistor is connected to each of the CS43L43
headphone outputs, HP_A and HP_B. This is use-
ful when evaluating the CS43L43 headphone am-
plifier with test equipment that has high-impedance
inputs. RCA jacks are also provided on the head-
phone outputs for easy connection to test equip-
ment.
6. INPUT/OUTPUT FOR CLOCKS AND
DATA
The evaluation board has been designed to allow
interfacing to external systems via the 10-pin head-
er, HDR1. This header allows the evaluation board
to accept externally generated clocks and data. The
schematic for the clock/data I/O is shown in
Figure 10.
2. CS43L43 DIGITAL TO ANALOG
CONVERTER
A description of the CS43L43 is included in the
CS43L43 datasheet.
3. CS8415A DIGITAL AUDIO
RECEIVER
The system receives and decodes the standard
S/PDIF data format using a CS8415A Digital Au-
dio Receiver, Figure 4. The outputs of the
CS8415A include a serial bit clock, serial data, left-
right clock (FSYNC), de-emphasis control and a
256 Fs master clock. The operation of the
CS8415A and a discussion of the digital audio in-
terface are included in the CS8415A datasheet.
The evaluation board has been designed such that
the input can be either optical or coax, see Figure 5.
However, both inputs cannot be driven simulta-
neously.
7. POWER SUPPLY CIRCUITRY
Power is supplied to the evaluation board by five
binding posts (GND, +5 V, VL, VA, VA_HP), see
Figure 12. The +5 V input supplies power to the
+5 Volt digital circuitry (VA_+5, VD_+5), while
the VL input supplies power to the Voltage Level
Converters and the CS43L43 VL pin. VA and
VA_HP supply power to the CS43L43. For ease of
use, it is possible to connect VA, VA_HP and VL
to the same supply.
WARNING:
VA and VL must be between +1.7 V
and +3.6 V. VA_HP must be between +0.9 V and
+3.6 V. Operation outside of this range can cause
permanent damage to the device. See the CS43L43
datasheet for more details.
4. CS8415A DATA FORMAT
The CS8415A data format is selected through the
DIP switch. See Table 2 for details.
4
DS479DB2
CDB43L43
8. GROUNDING AND POWER SUPPLY
DECOUPLING
The CS43L43 requires careful attention to power
supply and grounding arrangements to optimize
performance. Figure 9 details the power distribu-
tion used on this board. The decoupling capacitors
are located as close to the CS43L43 as possible.
Extensive use of ground plane fill on both the ana-
log and digital sections of the evaluation board
yields large reductions in radiated noise.
11. CDB43L43 PERFORMANCE PLOTS
The CDB43L43 Rev A performance plots shown in
Figures 13 through 18 were generated using an Au-
dio Precision System Two Cascade with the S2-
AES17LP 20 kHz brickwall filter applied. All tests
were performed at a sampling rate of 48 kHz and
with VL, VA, and VA_HP set to the indicated volt-
age supply.
12. CDB43L43 REV A ERRATA
1) R20 and R30 have been stuffed with 0 ohm re-
sistors and 47 kohm pull-downs have been add-
ed to pins 3 and 28 of U4.
2) The DIP switch has been turned such that the
“open” position is denoted by the “1” on the
board.
3) R31 has been changed from a pull-up to a pull-
down.
4) A 1 Mohm pull-down has been added to U10
pin 8, located near R24.
The CDB43L43 was also modified to reflect the
changes made to the CS43L43 in Revision G. The
second circuit in Figure 3, page 8 of this datasheet
was removed, and the CS43L43 Revision G is
mounted on the CDB43L43 for evaluation.
9. CONTROL PORT SOFTWARE
The CDB43L43 is shipped with Windows based
software for interfacing with the CS43L43 control
port via the serial connector, J1. The software can
The USB of STM32F103RC cannot be connected to the PC. The chip can be recognized. D+ is pulled up by 1.5k. D+ and D- are matched with 22ohm resistors. The program uses the latest STM32_USB-FS-Device_L...
Running Lua scripting language on EFM32GG : https://training.eeworld.com.cn/course/2290This paper describes how to run Lua scripting language on EFM32GG device and control MCU's GPIO and Timer through...
I downloaded the bxl package file from TI's 28335DSP website, and then used Ultra Librarian to convert it to Altium Designer, but there was a problem. Since the 28335DSP schematic library is divided i...
[p=30, 2, left][backcolor=rgb(239, 245, 249)]I have been using msp430 for work recently. I have never used it before and don't understand many things. I thought it would be better to write it down so ...
There are three types of mobile TV: one is based on analog TV broadcasting network, another is based on mobile communication network, and the other is based on digital broadcasting network. The f...[Details]
introduction
For the voltage regulator modules (VRMs) that power the latest computer central processing units (CPUs), power supply designers have historically used multiphase interleaved b...[Details]
I. Introduction
In the field of power conversion, isolated converters (forward, flyback, and double-ended) with low output DC voltage all use MOSFET as the rectifier device. Since these devi...[Details]
AD8205 is
a single-supply high-performance differential
amplifier
launched by
Analog
Devices of the United States
. The typical single-supply voltage is 5V, and its common-mode volta...[Details]
Vertical cavity surface emitting lasers (VCSELs) are gradually replacing traditional edge emitting lasers, especially in low bandwidth and short-distance communication systems where cost factors ar...[Details]
Toyohashi University of Technology demonstrated electric field coupled wireless power supply technology using life-size car tires and roads at the wireless technology exhibition "Wireless Technolog...[Details]
Experimental tasks
A DS18B20 is used to form a temperature measurement system. The temperature measurement accuracy reaches 0.1 degrees. The temperature range is between -20 degrees and +50 de...[Details]
1. When the slip speed regulating motor is undergoing frequency conversion and energy saving transformation, the original excitation box (referred to as the speed regulating box) and the original s...[Details]
In 2012, more than half of the cars in the European, Japanese and American car markets will be equipped with color displays, navigation systems, satellite communications and other in-vehicle infota...[Details]
At present, the traffic congestion in cities is quite serious. According to relevant news reports: In China, the traffic congestion has expanded from megacities such as Beijing, Shanghai, and Guangzho...[Details]
Only a small number of LED manufacturers can produce high-quality LEDs. For applications that are only used for simple indication, low-quality LEDs are sufficient. However, high-quality LEDs must...[Details]
1. Introduction
With the increasing popularity of fully automatic washing machines, consumers have higher and higher requirements for their environmenta...[Details]
Fruit planting is an important part of China's agricultural development, and fruit tree pest control operations are becoming more and more important. At present, the overall level of pesticide applica...[Details]
Currently, the commonly used solar cell technologies include monocrystalline silicon solar cells and polycrystalline silicon thin-film solar cells. Production process: Monocrystalline silicon solar...[Details]
1 Battery technology determines the fate of energy vehicles
Regardless of whether new energy vehicles are hybrid or pure electric vehicles, they cannot do without the core technology of batter...[Details]
stm32/stm8
京公网安备 11010802033920号
EEWORLD
