CS5376 View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS5376

Low Power Multi-Channel Decimation Filter

Cirrus Logic 

CS5376

e2dreq bit is automatically set high. When e2dreq

goes low, the data was accepted and new data can

be written.

Write TBS ROM Data - 0x07

Register

SPI1CMD

SPI1DAT1

SPI1DAT2

Command Transaction

0x07 - TBS ROM Data Write Cmd

--

--

This SPI 1 command initializes the included test bit

stream data for use by the test bit stream generator.

This command only requires writing the SPI1CMD

register; the SPI1DAT1 and SPI1DAT2 registers

are not used. See “Test Bit Stream Generator” on

page 81 for more information on generating test

signals using the ROM based test bit stream data

set.

Filter Start - 0x08

Register

SPI1CMD

SPI1DAT1

SPI1DAT2

Command Transaction

0x08 - Filter Start Command

--

--

This SPI 1 command initializes the decimation en-

gine and starts the digital filters. This command

only requires writing the SPI1CMD register; the

SPI1DAT1 and SPI1DAT2 registers are not used.

The decimation engine will use the filtering config-

uration specified in the FILT_CFG register (0x20)

and coefficients specified by previous SPI 1 com-

mands. See “Digital Decimation Filter” on page 53

for details on decimation engine configurations.

Filter Stop - 0x09

Register

SPI1CMD

SPI1DAT1

SPI1DAT2

Command Transaction

0x09 - Filter Stop Command

--

--

This SPI 1 command disables the digital filters in

the decimation engine. This command only re-

quires writing the SPI1CMD register; the

SPI1DAT1 and SPI1DAT2 registers are not used.

The digital filters are disabled by halting the sinc

filters, which stops the data flow through the digital

filter chain. To place the CS5376 into a low power

standby mode, the decimation engine clock can be

set to 32kHz in the CONFIG register (0x00) after

calling this SPI command.

DS256PP1

39

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