
Features
Monolithic Digital Audio Interface
Transmitter
Supports: AES/EBU, IEC 958,
S/PDIF, & EIAJ CP-340
Professional and Consumer Formats
Host Mode and Stand Alone Modes
Generates CRC Codes and Parity Bits
On-Chip RS422 Line Driver
Configurable Buffer Memory (CS8401A)
Transparent Mode Allows Direct
Connection of CS8402A and CS8412
or CS8401A and CS8411A
General Description
The CS8401/2A are monolithic CMOS devices which
encode and transmit audio data according to the
AES/EBU, IEC 958, S/PDIF, & EIAJ CP-340 interface
standards. The CS8401/2A accept audio and digital
data, which is then multiplexed, encoded and driven
onto a cable. The audio serial port is double buffered
and capable of supporting a wide variety of formats.
The CS8401A has a configurable internal buffer mem-
ory, loaded via a parallel port, which may be used to
buffer channel status, auxiliary data, and/or user data.
The CS8402A multiplexes the channel, user, and valid-
ity data directly from serial input pins with dedicated
input pins for the most important channel status bits.
ORDERING INFORMATION:
TABLE OF CONTENTS:
page 30
page 31
NOV ’93
DS60F1
1
Crystal Semiconductor Corporation
P.O. Box 17847, Austin, TX 78760
(512) 445-7222 FAX: (512) 445-7581
Digital Audio Interface Transmitter
Semiconductor Corporation
Serial Port
MUX
RS422 Driver
FSYNC
SDATA
SCK
A4 - A0
D7- D0
5
8
16
14
7
8
6
20
17
TXP
TXN
CS8401A
CS8402A
MCK
5
INT
15
Memory
Buffer
Configurable
Audio
RD/WR
CS
Prescaler
MUX
RS422 Driver
Serial Port
MCK
RST
M0
M1
M2
FSYNC
SDATA
SCK
C
U
V
8
6
7
10
11
9
21
22
23
5
16
20
17
Dedicated Channel
Status Bits
TXP
TXN
7
CBL
Audio
Registers
15
24
TRNPT
CS8401A CS8402A