CS8403 View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS8403

96 kHz Digital Audio Transmitter

Cirrus Logic 

CS8403A CS8404A

Consumer - CD Submode

The consumer CD submode is invoked by placing

the part in consumer mode (PRO = high) and set-

ting both FC1 and FC0 high. This mode redefines

some of the pins for a CD subcode port as shown in

Figure 21. The CD subcode port pins, SBF and

SBC, replace the C and CBL pins respectively. The

user data input, U, becomes the CD subcode input.

Figure 22 describes the timing for the CD subcode

port. When SBF is low, SBC becomes active,

clocking in the subcode bits. SBF goes high for one

SCK period, one half SCK period after the active

edge of FSYNC for all formats (except format 4,

which will be one and a half SCK periods after the

active edge of FSYNC). SBF high for more than 16

SBC periods indicates the start of a subcode block.

The first, third, and fourth Q bits after the start of a

subcode block become channel status bits 5, 2, and

3 respectively. Channel status bits are set by the

dedicated pins; the category code is forced to CD.

SDATA

SCK

FSYNC

8

6

7

M2 M1 M0

23 22 21

Serial

Port

Logic

Audio

Aux

SBF

U

10

11

SBC 15

V9

Subcode

Port

Registers

C Bits

U Bits

Validity

Preamble

Biphase

Mark

Encoder

Mux

Timing

Line

Driver

20 TXP

17 TXN

16 RST

Parity

+5V

2 3 24 4 1 13 14 12

PRO FC0 FC1 C2 C3 C8 C9 C15

5

MCK

Figure 21. CS8404A Block Diagram - Consumer Mode, CD Submode

DS239PP1

25

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