PCM1716ESLASH2K datasheet(8/18 Pages) TI

8 / 18 page

PCM1716

1024 system (XTI) clocks

Reset

Reset Removal

XTI Clock

Internal Reset

RST

(1)

NOTE: (1) t

RST = 20ns min.

1024 system (= XTI) clocks

Reset

Reset Removal

CC = VDD

Internal Reset

XTI Clock

FIGURE 5. Internal Power-On Reset Timing.

FUNCTIONAL DESCRIPTION

PCM1716 has several built-in functions including digital

attenuation, digital de-emphasis, input data format selection,

and others. These functions are software controlled. PCM1716

can be operated in two different modes, software mode or

hardware mode. Software mode is a three-wire interface

using pin 28 (ML), 27 (MC), and 26 (MD).

PCM1716 can also be operated in hardware mode, where

static control signals are used on pin 28 (115, pin 27 (DM1),

pin 26 (DM0) and pin 23 (IWO).

This basic operation mode as software or hardware can be

selected by pin 24 (MODE) as shown in Table II.

MODE (pin 24) = H

Software Mode

MODE (pin 24) = L

Hardware Mode

TABLE II. Mode Control.

Table III indicates which functions are selectable within the

users chosen mode. All of the functions shown are selectable

within the software mode, but only de-emphasis control, soft

mute and input data format may be selected when using

PCM1716 in the hardware mode.

SOFTWARE

HARDWARE

FUNCTION

(Mode = H)

(Mode = L)

Input Data Format Selection

Input Data Bit Selection

Input LRCIN Polarity Selection

De-emphasis Control

Mute

Attenuation

Infinity Zero Mute Control

DAC Operation Control

Slow Roll-Off Selection

Output Phase Selection

CLKO Output Selection

NOTE: O = Selectable, X: Not Selectable.

TABLE III. Mode Control, Selectable Functions.

HARDWARE MODE (MODE = L)

In hardware mode, the following function can be selected.

De-emphasis control

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

DM0 (pin 26)

FIGURE 6. External Forced Reset Timing.

Not Recommended For New Designs

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