AD1892 查看數據表（PDF） - Analog Devices

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AD1892

Integrated Digital Receiver/Rate Converter

Analog Devices 

BYTE 2

BITS 0 1 2 3 SOURCE NUMBER

0 0 0 0 UNSPECIFIED.

1000 1

0100 2

1100 3

0 0 1 0 4 TO

0 1 1 1 14 (BINARY – BIT 0 IS LSB, BIT 3 IS MSB)

1 1 1 1 15

BITS 4 5 6 7 CHANNEL NUMBER

0 0 0 0 UNSPECIFIED.

1 0 0 0 A (LEFT IN 2 CHANNEL FORMAT)

0 1 0 0 B (RIGHT IN 2 CHANNEL FORMAT)

1 1 0 0 C TO

0 1 1 1 N (BINARY – BIT 4 IS LSB, BIT 7 IS MSB)

1111 O

Figure 10. Consumer Channel Status Byte 2

BYTE 3

BITS 0 1 2 3 FS: SAMPLE FREQUENCY

0 0 0 0 44.1 kHz.

0 1 0 0 48 kHz.

1 1 0 0 32 kHz.

X X X X ALL OTHER STATES OF BITS 0–3 ARE RESERVED.

BITS 4 5

00

01

10

11

CLOCK ACCURACY

LEVEL II, ؎1000 ppm (DEFAULT).

LEVEL III, VARIABLE PITCH.

LEVEL I, ؎50 ppm – HIGH ACCURACY.

RESERVED.

BITS 6 7

XX

RESERVED.

RESERVED

BYTES 4–23

Figure 11. Consumer Channel Status Bytes 3 Through 23

AD1892

BYTE 0

BIT 0

PRO = 1 (PROFESSIONAL)

0

CONSUMER USE OF CHANNEL STATUS BLOCK.

1

PROFESSIONAL USE OF CHANNEL STATUS BLOCK.

BIT 1

AUDIO

0

NORMAL AUDIO.

1

NON-AUDIO. CAN BE USED TO INDICATE AC-3 DATA.

BITS 2 3 4 ENCODED AUDIO SIGNAL EMPHASIS

0 0 0 EMPHASIS NOT INDICATED. RECEIVER DEFAULTS

TO NO EMPHASIS WITH MANUAL OVERRIDE ENABLED.

1 0 0 NONE. RECEIVER MANUAL OVERRIDE DISABLED.

1 1 0 50/15 µs. RECEIVER MANUAL OVERRIDE DISABLED.

1 1 0 CCITT J.17. RECEIVER MANUAL OVERRIDE DISABLED.

X X X ALL OTHER STATES OF BITS 2–4 ARE RESERVED.

BIT 5

LOCK: SOURCE SAMPLE FREQUENCY

0

LOCKED–DEFAULT.

1

UNLOCKED.

BITS 6 7

00

01

10

11

FS: SAMPLE FREQUENCY

SAMPLE FREQUENCY NOT INDICATED.

RECEIVER DEFAULTS TO 48 kHz AND MANUAL

OVERRIDE OR AUTO SET ENABLED.

48 kHz. MANUAL OVERRIDE OR AUTO SET DISABLED.

44.1 kHz. MANUAL OVERRIDE OR AUTO SET DISABLED.

32 kHz. MANUAL OVERRIDE OR AUTO SET DISABLED.

BYTE 1

BITS 0 1 2 3 CHANNEL MODE

0 0 0 0 MODE NOT INDICATED. RECEIVER DEFAULTS TO

2-CHANNEL MODE. MANUAL OVERRIDE ENABLED.

0 0 0 1 TWO CHANNELS. MANUAL OVERRIDE DISABLED.

0010

0011

0100

0101

SINGLE CHANNEL. MANUAL OVERRIDE DISABLED.

PRIMARY/SECONDARY (CH. A IS PRIMARY). MANUAL

OVERRIDE DISABLED.

STEREOPHONIC (CH. A IS LEFT). MANUAL OVERRIDE

DISABLED.

RESERVED FOR USED DEFINED APPLICATIONS.

0 1 1 0 RESERVED FOR USED DEFINED APPLICATIONS.

1 1 1 1 VECTOR TO BYTE 3. RESERVED.

X X X X ALL OTHER STATES OF BITS 0–3 ARE RESERVED.

BITS 4 5 6 7 USER BIT MANAGEMENT

0 0 0 0 DEFAULT. NO USER INFORMATION INDICATED.

0 0 0 1 192 BIT BLOCK STRUCTURE. PREAMBLE 'Z' STARTS

BLOCK.

0 0 1 0 RESERVED.

0 0 1 1 USER DEFINED APPLICATION.

X X X X ALL OTHER STATES OF BITS 4–7 ARE RESERVED.

Figure 12. Professional Channel Status Bytes 0 and 1

REV. 0

–11–

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