CS8420-CS Cirrus Logic Inc, CS8420-CS Datasheet - Page 11

• Manufacturer Part Number: CS8420-CS
• Description: Transceiver IC
• Manufacturer: Cirrus Logic Inc

Specifications of CS8420-CS

• Audio Control Type: Sample Rate Converter
• Supply Voltage Range: 4.75V To 5.25V
• Operating Temperature Range: -10°C To +70°C
• Audio Ic Case Style: SOIC
• No. Of Pins: 28
• Msl: MSL 2 - 1 Year
• Frequency Max: 108GHz
• Bandwidth: 20kHz
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3.
The CS8420 is a fully asynchronous sample rate
converter plus AES3 transceiver intended to be
used in digital audio systems. Such systems include
digital mixing consoles, effects processors, tape re-
corders and computer multimedia systems. The
CS8420 is intended for 16, 20, and 24-bit applica-
tions where the input sample rate is unknown, or is
known to be asynchronous to the system sample
rate.
On the input side of the CS8420, AES3 or a 3-wire
serial format can be chosen. The output side pro-
duces both AES3 and a 3-wire serial format. An
I
lows full block processing of channel status and
user data via block reads from the incoming AES3
data stream and block writes to the outgoing AES3
data stream. The user can also access information
decoded from the input AES3 data stream, such as
the presence of non-audio data and pre-emphasis,
as well as control the various modes of the device.
For users who prefer not to use a micro-controller,
six hardware modes have been provided, docu-
mented towards the end of this data sheet. In these
modes, flexibility is limited, with pins providing
some programmability.
DS245PP2
2
C/SPI compatible microcontroller interface al-
GENERAL DESCRIPTION
When used for AES3 in, AES3 out applications, the
CS8420 can automatically transceive user data that
conforms to the IEC60958 recommended format.
The CS8420 also allows access to the relevant bits
in the AES3 data stream to comply with the serial
copy management system (SCMS).
The diagram on the cover of this data sheet shows
the main functional blocks of the CS8420. Figure 5
shows the supply and external connections to the
device.
Familiarity with the AES3 and IEC60958 specifi-
cations are assumed throughout this document. The
Application Note: “Overview of Digital Audio In-
terface Data Structures”, contains a tutorial on dig-
ital
Understanding and Implementation of the SCMS
Serial Copy Management System for Digital Audio
Transmission”, by Clif Sanchez, is an excellent tu-
torial on SCMS. It may be obtained from Crystal
Semiconductor, or from the AES.
To guarantee system compliance, the proper stan-
dards documents should be obtained. The latest
AES3 standard should be obtained from the Audio
Engineering Society or ANSI, the latest IEC60958
standard from the International Electrotechnical
Commission and the latest EIAJ CP-1201 standard
from the Japanese Electronics Bureau.
audio
specifications.
The
paper
CS8420
“An
11