CS5376 View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS5376

Low Power Multi-Channel Decimation Filter

Cirrus Logic 

CS5376

10. SERIAL DATA OUTPUT PORT

After digital filtering is completed, each 24-bit out-

put sample is combined with an 8-bit status word.

This 32-bit data word is written to an 8-deep FIFO

buffer and then transmitted to the communications

interface through the high speed serial data output

port (SD port).

The buffering provided by the SD port data FIFO

relaxes the timing requirements for polling conver-

sion data from the CS5376. When running a 4-

channel digital filter, the communications control-

ler can delay up to 2 output periods before request-

ing data from the SD port. A 1-channel or 2-

channel system has even longer delays before the

FIFO data is overwritten.

10.1 SD Port Pin Descriptions

SDTKI - Pin 64

Input signal which will initiate SDRDY signaling

to start an SD port transaction.

SDRDY - Pin 61

Signal which goes low to indicate that 32-bit con-

version words are available to be clocked out of the

SDDAT pin.

SDCLK - Pin 62

Input clock which determines the rate at which the

SDDAT bits are output. Data is valid on rising edg-

es of SDCLK, and transitions on falling edges.

SDDAT - Pin 60

Serial data output for conversion words from the

CS5376. Formatted to output a 32-bit digital word

consisting of one status byte followed by a three

byte conversion word.

SDTKO - Pin 63

Output signal which indicates the current SD port

transaction has been completed.

SDTKI - Serial Data Chip Select Input, pin 64

Input signal which will initiate SDRDY signaling to start an SD port transaction.

SDRDY - Serial Data Ready Output, pin 61

Signal which goes low to indicate that 32-bit conversion words are available to be

clocked out of the SDDAT pin.

SDCLK - Serial Data Clock Input, pin 62

Input clock which determines the rate at which the SDDAT bits are output. Data is

valid on rising edges of SDCLK, and transitions on falling edges.

SDDAT - Serial Data Output, pin 60

Serial data output for conversion words from the CS5376. Formatted to output a 32-bit

digital word consisting of one status byte followed by a three byte conversion word.

SDTKO - Serial Data Chip Select Output, pin 63

Output signal which indicates the current SD port transaction has been completed.

Figure 45. Serial Data Output Port Pins

DS256PP1

71

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