7

PCM1715U

®

At ATT DATA: 0XFF, output is 0dB. At ATT DATA

0X00, output is –

∞.

When “Muting” is chosen by output mode control, out-

put goes to –

∞ from the present ATT level.

Moving speed from 0dB to –

∞ is 1024/f.

Initialized (RESET) ATT level is 0dB.

(2) Versatile Output Mode [PL0 ~ PL3]

By using PL0 ~ PL3 data, up to 16 different output

modes (Lch/Rch/L+R/MUTE) can be selected to the

output of Lch and Rch, as shown in Table I.

Initialized mode is STEREO mode.

(3) De-emphasis Control (DEM)

De-emphasis function is controlled by DEM flag (H:

ON, L: OFF)

De-emphasis is enabled only at 44.1kHzfs. At other fs

frequencies, de-emphasis error is not guaranteed. Initial-

ized mode is De-emphasis OFF.

(4) Attenuator Control (ATC)

If common attenuator control of Lch and Rch is needed,

use the ATC flag (ATC = “H”). Common attenuation can

be controlled by Lch (AL0 ~ AL7) data. Initialized mode

is individual.

(5) Infinity-Zero Detection

The PCM1715 has an infinity-zero detect function which

monitors the input data and bit clock. When the input

Lch

Rch

PL0

PL1

PL2

PL3

OUTPUT

OUTPUT

NOTE

0

0

0

0

MUTE

MUTE

MUTE

0

0

0

1

MUTE

R

0

0

1

0

MUTE

L

0

0

1

1

MUTE

(L + R)/2

0

1

0

0

R

MUTE

01

0

1

R

R

0

1

1

0

R

L

REVERSE

0

1

1

1

R

(L + R)/2

1

0

0

0

L

MUTE

1

0

0

1

L

R

STEREO

10

1

0

L

L

1

0

1

1

L

(L + R)/2

1

1

0

0

(L + R)/2

MUTE

1

1

0

1

(L + R)/2

R

1

1

1

0

(L + R)/2

L

1

1

1

1

(L + R)/2

(L + R)/2

MONO

data is continuously “zero” for 8192 cycles of the bit

clock, the infinity zero detect occurs and the DAC

(6) Reset

Normally, internal initialize (reset) is done automatically

accepts external forced reset by RSTB=L. During

after internal initialize (1024XTI clock count after

RSTB=H).

MODE CONTROL FORMAT

MC

AR3 AR4 AR5

MD

ML

AL0

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9876543210

AL1 AL2

AL4 AL5 AL6 AL7 AL0

AR2

AR1

AR6 AR7 PL0 PL1 PL2 PL3 DEM ATC

AL3

MSB

MSB

LSB

LSB

TABLE I. PCM1715 Output Mode Control.