CS8401A-IP datasheet(23/34 Pages) ETC

23 / 34 page

C2 is tied high, channel status bit 2 will be trans-

mitted as a zero. Also, FC0 and FC1 are encoded

versions of channel status bits 24 and 25, which

define the sample frequency. When FC0 and FC1

are both high, the part is placed in a CD sub-

mode which activates the CD subcode port. This

submode is described in detail in the next sec-

tion. Table 5 describes the encoding of C24 and

C25 through the FC1 and FC0 pins. According

to AES/EBU standards, C2 is copy prohibit/per-

mit, C3 specifies pre-emphasis, C8 and C9

define the category code, and C15 identifies the

generation status of the transmitted material (i.e..

first generation, second generation).

Consumer - CD Submode

The consumer CD submode is invoked by plac-

ing the part in consumer mode (PRO = high) and

setting both FC1 and FC0 high. This mode rede-

fines 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 respec-

tively. 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 be-

comes active, clocking in the subcode bits. SBF

goes high for one SCK period, one half SCK pe-

riod 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. Chan-

nel status bits are set by the dedicated pins; the

category code is forced to CD.

Parity

Preamble

Timing

Mux

MCK

TXP

TXN

Serial

Port

Audio

Logic

FSYNC

SCK

SDATA

C Bits

Aux

Biphase

Mark

Encoder

Line

Driver

RST

CBL

FC1

FC0

PRO

C15

+5V

Registers

U Bits

Validity

Figure 20. CS8402A Block Diagram - Consumer Mode

Table 5. Sample Frequency Encoding

FC1

FC0

C24

C25

Comments

44.1 kHz

48.0 kHz

32.0 kHz

44.1 kHz, CD Mode

Table 4. Emphasis Encoding

EM1

EM0

CS8402A

DS60F1

CS8401A-IP 数据表(PDF) 23 Page - List of Unclassifed Manufacturers

CS8401A-IP 数据表(HTML) 23 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34

数据表下载