PCM1728ESLASH2K datasheet(8/16 Pages) TI1

8 / 16 page

PCM1728

FIGURE 5. Internal Power-On Reset Timing.

FUNCTIONAL DESCRIPTION

PCM1728 has several built-in functions including digital

input data format selection, soft mute, and digital de-empha-

sis. These functions are hardware controlled where static

control signals are used on pin 28 (I2S), pin 27 (DM1), pin 26

(DM0), pin 25 (MUTE), pin 24 (IW1), and pin23 (IW0).

DATA FORMAL SELECTION

PCM audio data format can be selected by pin 28 (I2S), pin

24 (IW1), and pin 23 (IW0), as shown in Table II.

FIGURE 6. External Forced Reset Timing.

1024 system (= XTI) clocks

Reset

Reset Removal

CC = VDD

Internal Reset

XTI Clock

1024 system (XTI) clocks

Reset

Reset Removal

XTI Clock

Internal Reset

RST

(1)

NOTE: (1) t

RST = 20ns min.

IW1

IW0

I2S

AUDIO INTERFACE

16-Bit Standard, Right-Justified

20-Bit Standard, Right-Justified

24-Bit Standard, Right-Justified

24-Bit Left-Justified, MSB-First

16-Bit I2S

24-Bit I2S

Reserved

TABLE II. Data Format Control.

SOFT MUTE

Soft Mute function can be controlled by MUTE (pin 25).

MUTE (Pin 25)

SOFT MUTE

Mute ON

Mute OFF (Normal Operation)

TABLE III. Soft Mute Control.

DE-EMPHASIS CONTROL

De-emphasis control can be selected by DM1 (pin 27) and

DM0 (pin 26).

DM1 (Pin 27)

DM0 (Pin 26)

DE-EMPHASIS

OFF

48kHz

44.1kHz

32kHz

TABLE IV. De-emphasis Control.

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