MAS3506D datasheet(11/52 Pages) MICRONAS

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PRELIMINARY DATA SHEET

MAS 3506D

Micronas

2.5.2. Parallel Input Output Interface (PIO)

The parallel interface of the MAS 3506D consists of

the lines PI0..PI4, PI8, PI12..PI19:

These signals are used to indicate the status of the

Broadcast Channel and the MPEG Layer 3 decoder.

The PIO pin status is also accessible via I2C interface

(see Table 3–10).

Table 2–2: PIO input and output pin assignment

during MPEG decoding

PIO

Name

Comment

PI19

(O)

BC-FRAME-TOGGLE

Output level tog-

gled each BC-

FRAME

PI18

(I)

BCINENABLE

enables SI* inputs

enables SI inputs

PI13

(O)

BC-FRAME-SYNC

start of new frame

P12

(O)

BC-SYNC

unsynched

synched to BC

PI8

(O)

MPEG-CRC-ERROR

no error

CRC-error or sync

lost

PI4

(O)

MPEG-FRAME-SYNC

sync to a new

MPEG frame

PI3

(I)

AUD-SW

May be used to

monitor a signal

indicating switch-

ing between

Headphone and

Loudspeaker

mode.

PI2,

PI1,

PI0

(I)

Reserved

The PI-pins may

be monitored by

reading the PIO

Table 3–10)

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