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PCM1804

SLES022C – DECEMBER 2001 – REVISED OCTOBER 2007

Terminal Functions

TERMINAL

I/O

DESCRIPTIONS

NAME

PIN

AGND

23

–

Analog ground

AGNDL

2

–

Analog ground for VREFL

AGNDR

27

–

Analog ground for VREFR

BCK/DSDL

16

I/O

Bit clock input/output in PCM mode. L-channel audio data output in DSD mode. (1)

BYPAS

12

I

HPF bypass control. High: HPF disabled, Low: HPF enabled (1)

DATA/DSDR

15

O

L-channel and R-channel audio data output in PCM mode. R-channel audio data output in DSD mode. (DSD

output, when in DSD mode)

DGND

13

–

Digital ground

FMT0

6

I

Audio data format 0. See Table 5. (2)

FMT1

7

I

Audio data format 1. See Table 5. (2)

LRCK/DSDBCK

17

I/O

Sampling clock input/output in PCM and DSD modes. (1)

OSR0

9

I

Oversampling ratio 0. See Table 1 and Table 2. (2)

OSR1

10

I

Oversampling ratio 1. See Table 1 and Table 2. (2)

OSR2

11

I

Oversampling ratio 2. See Table 1 and Table 2. (2)

OVFL

21

O

Overflow signal of L-channel in PCM mode. This is available in PCM mode only.

OVFR

20

O

Overflow signal of R-channel in PCM mode. This is available in PCM mode only.

RST

19

I

Reset, power-down input, active-low (2)

SCKI

18

I

System clock input; 128 fS, 256 fS, 384 fS, 512 fS, or 768 fS.

(3)

S/M

8

I

Slave/master mode selection. See Table 4. (2)

VCC

22

–

Analog power supply

VCOML

3

–

L-channel analog common-mode voltage (2.5 V)

VCOMR

26

–

R-channel analog common-mode voltage (2.5 V)

VDD

14

–

Digital power supply

VINL–

5

I

L-channel analog input, negative pin

VINL+

4

I

L-channel analog input, positive pin

VINR–

24

I

R-channel analog input, negative pin

VINR+

25

I

R-channel analog input, positive pin

VREFL

1

–

L-channel voltage reference output, requires capacitors for decoupling to AGND

VREFR

28

–

R-channel voltage reference output, requires capacitors for decoupling to AGND

(1)

Schmitt-trigger input

(2)

Schmitt-trigger input with internal pulldown (51 k

μ typically), 5-V tolerant.

(3)

Schmitt-trigger input, 5-V tolerant.

4

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Product Folder Link(s): PCM1804