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CRD42L52
Reference Design and Peripheral Driver Board for CS42L52
Reference Design Board (CRD42L52)
Features
Ultra-Small Layout
Stake Header for External System Connections
1/8” Stereo Input Allows up to 2 Vrms Signals
1/8” Stereo Headphone Output Jack
Built-in Switch Control for CS42L52 SPKR/HP
Pin
Stereo Full Bridge Speaker Output Terminal
Complies with FCC class B and CISPR 22
Standards for Radiated Emissions
Peripheral Driver Board (CDB42LDB1)
Features
Multiple Power Supply Options
– Three AAA Battery Source
– External Power Supply Header
S/PDIF I/O (CS8416 Receiver)
– Optical and RCA Input Jacks
S/PDIF I/O (CS8406 Transmitter)
– Optical and RCA Output Jacks
Description
In addition to providing a reference for an ultra small lay-
out design, the purpose of the CRD42L52 is to allow a
quick and easy evaluation of the CS42L52 low power
stereo CODEC.
Two 1/8” stereo jacks on the CRD42L52 provide an in-
terface for analog line-level input and headphone-level
output connections to the CS42L52. Stereo differential
PWM speaker outputs from the CS42L52 can be moni-
tored on a pair of screw terminals on the CRD42L52.
The control port and serial audio interfaces are accessi-
ble via the I/O stake header used to attach the
CRD42L52 to the CDB42LDB1.
The CDB42LDB1 is a peripheral driver board that pro-
vides clock/data, control logic and power supply to the
CRD42L52. Digital data is transmitted and received via
S/PDIF optical and RCA connectors. The CRD42L52
can be programmed by using the Windows Compatible
FlexGUI software provided. Power is derived either
from three AAA batteries or from an external supply on
the CDB42LDB1 driver board and is routed to the
CRD42L52 via the I/O stake header.
ORDERING INFORMATION
FlexGUI S/W Control - Windows ? Compatible
– Pre-Defined & User Configurable Scripts
CRD42L52
CDB42LDB1
Reference Design
Driver Board
Speaker
Left
+
-
CRD42L52
Line
Input
USB
Microcontroller
J3
J4
External
Power
Right
CS42L52
+
-
Headphone
Output
AAA Battery
Clip
I2C
Control
Port
SAI
Power
Supply
I2C Control Port
Interface
Micro Reset
CRD
Placeholder
Pushbutton
I/O Header
J5
S/PDIF
Input
Serial Audio Interface
S/PDIF
Output
S/PDIF Rx
CS8416
MCLK
12.288 MHz
S/PDIF Tx
CS8406
CDB42LDB1
http://www.cirrus.com
Copyright ? Cirrus Logic, Inc. 2008
(All Rights Reserved)
APRIL '08
DS680RD1
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