www.ti.com

PCM1609A

SLES145A – AUGUST 2005 – REVISED AUGUST 2006

B15

B14

B13

B12

B11

B10

B9

B8

B7

B6

B5

B4

B3

B2

B1

B0

REGISTER 9

R/W

IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0

RSV

RSV

FLT

CLKD

CLKE

FMT2

FMT1

FMT0

R/W – Read/Write Mode Select

When R/W = 0, a write operation is performed.

When R/W = 1, a read operation is performed.

Default value: 0

FLT – Digital Filter Rolloff Control

This bit is read/write.

Default value: 0

FLT = 0

Sharp rolloff (default)

FLT = 1

Slow rolloff

The FLT bit allows users to select the digital filter rolloff that is best suited to their application. Two filter rolloff

selections are available: sharp or slow. The filter responses for these selections are shown in the Typical

Performance Curves section of this data sheet.

CLKD – SCKO Frequency Selection

This bit is read/write.

Default value: 0

CLKD = 0

CLKD = 1

The CLKD bit is used to determine the clock frequency at the system clock output pin, SCKO.

CLKE – SCKO Output Enable

This bit is read/write.

Default value: 0

CLKE = 0

SCKO enabled (default)

CLKE = 1

SCKO disabled

The CLKE bit is used to enable or disable the system clock output pin, SCKO. When SCKO is enabled, it

outputs either a full- or half-rate clock, based on the setting of the CLKD bit. When SCKO is disabled, it is set to

a LOW level.

FMT[2:0] – Audio Interface Data Format

These bits are read/write.

Default value: 000b

FMT[2:0]

Audio Data Format Selection

000

24-bit standard format, right-justified data (default)

001

20-bit standard format, right-justified data

010

18-bit standard format, right-justified data

011

16-bit standard format, right-justified data

100

101

Left-justified format, 16- to 24-bit

110

Reserved

111

Reserved

The FMT[2:0] bits are used to select the data format for the serial audio interface.

24

Submit Documentation Feedback