CRD-42L51 datasheet, PDF - EEWORLD Datasheet

Datasheet> All Categories > Module/solution> CRD-42L51

Preview

CRD-42L51: DescriptionAudio modules and development tools ref Bd low-volt stereo codec; CategoryModule/solution; File Size696KB，19 Pages; ManufacturerCirrus Logic; Websitehttp://www.cirrus.com

Download Datasheet Compare View All

CRD-42L51 Overview

Audio modules and development tools ref Bd low-volt stereo codec

Preview

Download Datasheet

View All

CRD42L51

Reference Design for CS42L51

Features

Ultra Small Layout

Single AAA Battery Source

1/8” Stereo Input Allows up to 2 Vrms Signals

On-Board MIC

1/8” Stereo Headphone Output Jack

S/PDIF Input (CS8416 Receiver)

Flexible User Interface

Description

The CRD42L51 evaluation board provides a quick and

easy evaluation of select features in the CS42L51 Low

Power, Stereo CODEC. Four pushbuttons and sixteen

LED’s comprise the user interface, allowing manipula-

tion of the CS42L51’s registers and control clock/data

routing between the CODEC, crystal oscillator, and

S/PDIF Receiver.

Two 1/8” stereo jacks provide analog input and output

connections, and a S/PDIF optical receiver provides a

digital input connection. An on-board microphone dem-

onstrates the high dynamic range of the CS42L51’s

Programmable Gain Amplifier (PGA) and MIC pre-

amplifier.

Power is derived from a single AAA battery boosted up

to 3.3 V for the interface and control logic, then regulat-

ed down to 1.8 V for the CS42L51’s analog/digital core

and headphone supply.

The CRD42L51 highlights the ultra small layout re-

quired for the CS42L51. Required components include

only a few small ceramic capacitors and resistors.

ORDERING INFORMATION

CRD42L51

–

2 Pushbuttons Enable, Disable and

Navigate between Reset, Standby, Input

Source and Effects Options

2 Pushbuttons Adjust Volume and Effects

CRD42L51 Actual Size

Reference Design

Push Buttons

LED Selection

Indicators

+3.3 V

+1.8 V

Step Up DC-DC

Converter w/

Linear Reg.

AAA

Battery Clip

I²C Control/Reset

Microcontroller

1/8" Stereo Line

Input Jack

Optical

Input Jack

CS8416

Clocks/Data

CS42L51

Omni-directional

Microphone

12.2880 MHz

Oscillator

Master Clock

1/8" Stereo

Headphone Jack

http://www.cirrus.com

Cirrus Logic, Inc. 2005

DECEMBER '05

DS679RD1

CRD42L51

TABLE OF CONTENTS

1. QUICK-START GUIDE ........................................................................................................................... 3

2. FUNCTION & LEVEL DETAILS ............................................................................................................ 4

3. SYSTEM OVERVIEW ............................................................................................................................. 5

3.1 Power (U2) ..................................................................................................................................... 5

3.2 Microcontroller (U5) ........................................................................................................................ 5

3.3 CS42L51 Audio CODEC (U1) ........................................................................................................ 5

3.4 CS8416 Digital Audio Receiver (U4) .............................................................................................. 5

3.5 Oscillator (Y1) ................................................................................................................................. 5

3.6 Analog Input ................................................................................................................................... 5

3.7 Analog Outputs ............................................................................................................................... 5

3.8 Switch & Pushbutton ...................................................................................................................... 6

3.9 LEDs ............................................................................................................................................... 6

3.10 Error Indicators ............................................................................................................................. 6

3.11 Layout ........................................................................................................................................... 6

4. SYSTEM CONNECTIONS & INTERFACE ............................................................................................. 7

5. CRD42L51 SCHEMATICS ..................................................................................................................... 9

6. CRD42L51 LAYOUT ........................................................................................................................... 13

7. REVISION HISTORY ............................................................................................................................ 19

LIST OF FIGURES

Figure 1. Block Diagram............................................................................................................................... 8

Figure 2. CS42L51 and Analog I/O (Schematic Sheet 1) ............................................................................ 9

Figure 3. S/PDIF Input (Schematic Sheet 2).............................................................................................. 10

Figure 4. Microcontroller, Pushbuttons and LED Indicators (Schematic Sheet 3) ..................................... 11

Figure 5. DC-DC Converter and AAA Battery Clip (Schematic Sheet 4) ................................................... 12

Figure 6. Silk Screen Top........................................................................................................................... 13

Figure 7. Silk Screen Bottom ..................................................................................................................... 14

Figure 8. Top-Side Layer ........................................................................................................................... 15

Figure 9. Internal Layer (Ground Plane) .................................................................................................... 16

Figure 10. Internal Layer (Power Plane) .................................................................................................... 17

Figure 11. Bottom-Side Layer .................................................................................................................... 18

DS679RD1

CRD42L51

3. SYSTEM OVERVIEW

The CRD42L51 reference design provides a quick and general overview of the features in the CS42L51 CODEC

and provides a reference of an ultra small layout design. Line, MIC and S/PDIF sources are accomodated, and a

microcontroller automatically configures the board and the CODEC’s internal registers for straightforward opera-

tion.

The CRD42L51 schematic-set has been partitioned into four pages and is shown in

Figures 2

through

3.1

Power (U2)

Power is supplied to the board through a single AAA battery. A DC-DC Converter boosts the battery’s volt-

age to 3.3 V which is then regulated down to 1.8 V. The CS42L51 is powered from 1.8 V, demonstrating its

internal ground-centered amplifier’s ability to deliver ample power into headphone loads even at low supply

voltages. The interface logic between the CS8416, oscillator and CS42L51 operates at 3.3 V.

3.2

Microcontroller (U5)

The microcontroller controls digital signal routing between the CS42L51, CS8416 and oscillator in response

to user input via four pushbuttons. It automatically initializes the board to predefined settings once power is

applied.

3.3

CS42L51 Audio CODEC (U1)

A complete description of the CS42L51 (Figure

2 on page 9)

is included in the CS42L51 product data sheet.

The CS42L51 is automatically configured by the microcontroller to the default settings following a power-on

condition and later modified based on user input via four pushbuttons. See

Section 2

for a description of

each functional mode and the associated configuration setting for the CS42L51.

3.4

CS8416 Digital Audio Receiver (U4)

A complete description of the CS8416 receiver (Figure

3 on page 10)

and a discussion of the digital audio

interface are included in the CS8416 data sheet.

The CS8416 converts the input S/PDIF data stream from the optical connector into PCM data for the

CS42L51. The S/PDIF input may be mixed with the Line or MIC input. In this case, the CODEC clock source

comes from the CS8416. Should the S/PDIF source become unavailable, causing a Receiver Error, the mi-

crocontroller will automatically switch the system master clock to the oscillator for uninterrupted operation

of the Line or MIC input.

3.5

Oscillator (Y1)

The on-board oscillator provides the system master clock when the digital audio receiver is powered down

or when a Receiver Error occurs. Selections are automatically determined based on user input and system

status.

3.6

Analog Input

An 1/8” jack supplies the line-level analog inputs through an AC-coupled passive filter. Voltage dividers be-

fore the inputs to the CS42L51 allow up to 2 Vrms signals (NOTE: To amplify smaller signals, enable the

Automatic Level Control (ALC). The CS42L51 applies up to +12 dB analog gain, as needed, using the ALC

together with the integrated Programmable Gain Amplifier (PGA)). A surface-mount microphone connects

to one of the inputs of the CS42L51 and is mux’d with the Line input. Either the Line or MIC input may be

mixed with the S/PDIF input.

3.7

Analog Outputs

An 1/8” jack outputs the signal from the CS42L51’s ground-centered headphone amplifier. The load stabi-

lizer circuitry made up of a resistor/capacitor pair allow the amplifier to drive headphone in addition to line-

level loads.

DS679RD1

CRD-42L51 Related Products

	CRD-42L51	CRD42L51
Description	Audio modules and development tools ref Bd low-volt stereo codec	Audio IC Development Tools Ref Bd Low-volt Stereo CODEC

Recommended Resources

Single tuned IF amplifier circuit for radio

Wireless interface circuit

STK078 power amplifier circuit

Grating circuit using group value switch

875p computer motherboard circuit diagram_027

Computer motherboard circuit diagram 820 1_35

The lm3s615 timer generates a pwm wave that is always high: Please help me. I have been troubled for a few days. The program can be compiled successfully. The code is as follows #include#include#include#include#includeint main(void) { SysCtlClockSet( SYSCTL_SY...; panpan666 Microcontroller MCU

PDA reads GPS data and communicates with the server: Purpose: PDA uses C# to obtain GPS information and send it to the server. The relevant code found on the Internet ([url=http://www.wangchao.net.cn/bbsdetail_73074.html][/url]) can obtain GPS data. How...; 19041009 Embedded System

Problems with drawing lines on the touch screen in mobile!!: I now need to test whether I can draw lines on the touch screen under mobile. I saw on the Internet that the rubber band technique can be used to draw lines, but I use rubber band. The code I use is a...; zzxing Embedded System

Memory address: The at24c02 I wrote has an eight-bit storage address, but it doesn't appear on the simulation software. I used at24c512 instead and found that it has a 16-bit storage address. How should I change it?...; 意想不到1 MCU

Reset circuit problem: Please explain in detail the functions of the two resistors and one capacitor in the figure....; 践行者 Microcontroller MCU

STC89C52 board connection problem: I just started learning MCU. I bought a board and it can't be connected to the computer. It says that the USB interface cannot be recognized. What is the problem? Please help. The computer model is Le...; 说好的欢乐豆呢 51mcu

Shortcut: L0 L1 L2 L3 L4 L5 L6 L7 L8 L9 LA LB LC LD LE LF LG LH LI LJ LK LL LM LN LO LP LQ LR LS LT LU LV LW LX LY LZ M0 M1 M2 M3 M4 M5 M6 M7 M8 M9 MA MB MC MD ME MF MG MH MI MJ MK ML MM MN MO MP MQ MR MS MT MU MV MW MX MY MZ N0 N1 N2 N3 N4 N5 N6 N7 N8 NA NB NC ND NE NF NG NH NI NJ NK NL NM NN NO NP NQ NR NS NT NU NV NX NZ O0 O1 O2 O3 OA OB OC OD OE OF OG OH OI OJ OK OL OM ON OP OQ OR OS OT OV OX OY OZ P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 PA PB PC PD PE PF PG PH PI PJ PK PL PM PN PO PP PQ PR PS PT PU PV PW PX PY PZ Q1 Q2 Q3 Q4 Q5 Q6 Q8 Q9 QA QB QC QE QF QG QH QK QL QM QP QR QS QT QV QW QX QY R0 R1 R2 R3 R4 R5 R6 R7 R8 R9 RA RB RC RD RE RF RG RH RI RJ RK RL RM RN RO RP RQ RR RS RT RU RV RW RX RY RZ

Popular Components