STA020DJTR 查看數據表（PDF） - STMicroelectronics

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STA020DJTR

96 kHz digital audio interface transmitter

STMicroelectronics 

STA020

Overview

Table 3. Pin description (continued)

N°

Pin

Function

7

8

21,

22,23

FSYNC

SDATA

M0, M1, M2

Frame sync.

Delineates the serial data and may indicate the particular channel, left

or right, and may be an input or output. The format is based on M0, M1

and M2 pins.

Serial data.

Audio data serial input pin.

Serial port mode select.

Selects the format of FSYNC and the sample edge of SCK with respect

to SDATA.

Control pins

Channel status bit 7/Channel status bit 3

1

C7/C3

In professional mode, C7 is the inverse of channel status bit 7. In

consumer mode, C3 is the inverse of channel status bit 3, C7/C3 are

ignored in transparent mode.

Professional/Consumer select.

2

PRO

Selects between professional mode (PRO low) and consumer mode

(PRO high). This pin defines the functionality of the channel status

parallel pins. PRO is ignored in transparent mode.

Channel status bit 1/Frequency control 0.

In professional mode, C1 is the inverse of channel status bit 1. In

3

C1/FC0 consumer mode, FC0 and FC1 are encoded versions of channel status

bits 24 and 25 (bits 0 and 1 of byte 3). When FC0 and FC1 are both

high, CD mode is selected. C1/FC0 are ignored in transparent mode.

Channel status bit 6/Channel status bit 2.

4

C6/C2

In professional mode, C6 is the inverse of channel status bit 6. In

consumer mode, C2 is the inverse of channel status bit 2. C6/C2 are

ignored in transparent mode

Validity.

Validity bit serial input port. This bit is defined as per the digital audio

9

V

standards wherein V = 0 signifies the audio signal is suitable for

conversion to analog. V = 1 signifies the audio signal is not suitable for

conversion to analog, i.e. invalid.

Channel status serial input/Subcode frame clock.

10

C/SBF

In professional and consumer modes this pin is the channel status

serial input port. In CD mode this pin inputs the CD subcode frame

clock.

User bit.

11

U

User bit serial input port.

Channel status bit 9/Channel status bit 15.

12

C9/C15 In professional mode, C9 is the inverse of channel status bit 9 (bit 1 of

byte 1). In consumer mode, C15 is the inverse of channel status bit 15

(bit 7 of byte 1). C9/C15 are ignored in transparent mode.

Emphasis 1/Channel status bit 8.

13

EM1/C8 In professional mode, EM0 and EM1 encode channel status bits 2, 3

and 4. In consumer mode, C8 is the inverse of channel status bit 8 (bit 0

of byte 1). EM1/C8 are ignored in transparent mode.

DocID006832 Rev 7

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