CS5376A(2004) View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS5376A
(Rev.:2004)

Low Power Multi-Channel Decimation Filter

Cirrus Logic 

CS5376A

The E2DREQ bit reads high while a configuration

command is being processed. When low, the digital

filter is ready to receive a new configuration com-

mand.

9.4 Microcontroller Configuration

Commands

A summary of available microcontroller configura-

tion commands is listed in Table 7.

Write DF Register - 0x01

This configuration command writes a specified

digital filter register. Digital filter registers control

hardware peripherals and filtering functions. See

“Digital Filter Registers” on page 87 for the bit def-

initions of the digital filter registers.

Sample Command:

Write digital filter register 0x00 with data value

0x070431. Then write 0x20 with data 0x000240.

02 03 00 00 01 00 00 00 07 04 31

Delay 1 ms, monitor SINT, or poll E2DREQ

02 03 00 00 01 00 00 20 00 02 40

Delay 1 ms, monitor SINT, or poll E2DREQ

Read DF Register - 0x02

This command reads a specified digital filter regis-

ter. The register value is requested in the first SPI

transaction, with the register value copied to

SPI1DAT1 and read in a subsequent SPI transac-

tion.

Sample Command:

Read digital filter registers 0x00 and 0x20.

02 03 00 00 02 00 00 00

Name

NOP

WRITE DF REGISTER

READ DF REGISTER

WRITE FIR COEFFICIENTS

WRITE IIR COEFFICIENTS

WRITE ROM COEFFICIENTS

WRITE TBS DATA

WRITE ROM TBS

FILTER START

FILTER STOP

CMD

24-bit

000000

000001

000002

000003

000004

000005

000006

000007

000008

000009

DAT1

24-bit

-

REG

REG

[DATA]

NUM FIR1

(FIR COEF)

a11

b11

a22

b21

COEF SEL

NUM TBS

(TBS DATA)

-

-

-

DAT2

24-bit

-

DATA

-

-

NUM FIR2

(FIR COEF)

b10

a21

b20

b22

-

-

(TBS DATA)

-

-

-

Description

No Operation

Write Digital Filter Register

Read Digital Filter Register

Write Custom FIR Coefficients

Write Custom IIR Coefficients

Use On-Chip Coefficients

Write Custom Test Bit Stream Data

Use On-Chip TBS Data

Start Digital Filter Operation

Stop Digital Filter Operation

[DATA] indicates data word returned from digital filter.

(DATA) indicates multiple words of this type are to be written.

Table 7. Microcontroller Boot Configuration Commands

35

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