SM5844 查看數據表（PDF） - Nippon Precision Circuits

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SM5844

Asynchronous Sample Rate Converter

Nippon Precision Circuits  

SM5844AF

Direct Mute (DMUTE)

Direct mute ON/OFF

Table 6. DMUTE operation

DMUTE

Function

LOW

Normal data is output from the next output word (mute

OFF)

HIGH 0 data is output from the next output word (mute ON)

Reset mute

Table 7. RSTN mute operation

RSTN

LOW

HIGH

Function

0 data is output from the next output word (mute ON)

Normal data is output from the 3073rd output word

(mute OFF)

Internal operating status (STATE)

Internally, all functions are performed using 20-bit

serial data, and the conversion rate and filter type are

automatically selected for output. Output data is in

20-bit front-packed format.

Table 8. Bit function

Output bit position

1st to 18th

19th

20th

Content

(Output data cycle/input data cycle) − 9

Ex.

1st

18th

00.1111111111110111 ⇒ 1.0 times

01.1111111111110111 ⇒ 2.0 times (1/2 conversion rate ratio)

00.0111111111110111 ⇒ 0.5 times (2.0 conversion rate ratio)

DA1

Selected filter type

DA1

DA0

Filter

0

0

Up converter

DA0

1

0

44.1 to 48 kHz

0

1

32 to 44.1 kHz

1

1

32 to 48 kHz

Mode

1

2

3

4

Note that when THRUN is LOW, LRCO and BCKO are not guaranteed to be synchronized to the STATE

output.

NIPPON PRECISION CIRCUITS—17

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