SM7183 データシートの表示（PDF） - Samhop Mircroelectronics

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SM7183

ECHO

Samhop Mircroelectronics 

三合微科股份有限公司

SAMHOP Microelectronics Corp.

SM7183

ECHO

Echo Mode & Surround Mode

Audio In

Add

Low Pass

Filter

AD Converter

Low Pass

Filter

DA Converter

Echo Mode

Audio

out

SRAM

Audio In

Audio Out

Low Pass

Filter

Low Pass

Filter

AD Converter

DA Converter

SRAM

Surround Mode

When EC/SR pin is tie to VDD then SM7183 is set to Echo Mode. When EC/SR pin is

tie to GND then SM7183 is set to Surround Mode. The only difference between echo

mode and surround mode are there is no feed back & add path inside the SM7183.

And the delay time is shorter for surround mode then echo mode. But surround mode

provide higher sampling rate and better sound quality then echo mode.

MUTE CONTROL

After power up the SM7183 will turn off its output for 350 ms.

Any change of the EC/SR, PD1~2 pin and internal register,

SM7183 will mute and turn off its output for 350 ms.

Page 5

V.2.0 MAR. 8, 2002

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