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

FUNCTION DESCRIPTIONS:

Internal Control Register :

Serial Interface:

There is one register for SM7183's mode selection, mute control and delay time setting.

This 5-bits register can only be access by tie SDI/PDI pin to VDD.

When SDI/PDI is tie to VDD, the SM7183's state is control by this internal 5 Bits register.

These bits are Mode for select Echo/Surround, Mute, Delay 1, Delay 2, Delay 3 for control

delay time.

SDReq

SDCK

SDData

0

1

2

3

4

5

6

When SDREQ is low then SM7183 is ready for received data from SDDATA. SM7183 will

latch the SDDATA using the SDCK's negative edge.

BIT 0,1 are unused data.

BIT 2 is Mode as EC/SR

BIT 3 is Mute as MUTE

BIT 4 is Delay 1 as PD1

BIT 5 is Delay 2 as PD2

BIT 6 is Delay 3 as PD3

Parallel Mode:

There are corresponding pin for the 5 bits when SDI/PDI is tie to VSS, the SM7183's

state is control by external pins, like MUTE, Echo/Surround, PD1, PD2, PD3. The 5-Bits

register can be access by SDReq, SDCK, SDData pin follow the following timing

diagram.

Page 4

V.2.0 MAR. 8, 2002

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