MAS3549F datasheet(40/92 Pages) MICRONAS

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MAS 35x9F

DATA SHEET

June 30, 2004; 6251-505-1DS

Micronas

Table 3–11: D0 status memory cells

Memory

Address

Function

Name

D0:FCF

AAC bitrate in bit/s

AACbitrate

D0:FD0

MPEG Frame Counter

bit[19:0]

number of MPEG frames after synchronization

The counter will be incremented with every new frame that is decoded. With

an invalid MPEG bit stream at its input (e.g. an invalid header is detected), the

MAS 35x9F resets the MPEGFrameCount to ‘0’.

MPEGFrameCount

D0:FD1

MPEG Header and Status Information

bit[15]

reserved, must be set to zero

bit[14:13]

MPEG ID, Bits 12, 11 of the MPEG header

MPEG 2.5

reserved

MPEG 2

MPEG 1

not valid in case of AAC decoding (bit[12:11] = 00)

bit[12:11]

Bits 14 and 13 of the MPEG header

AAC

Layer 3

Layer 2

Layer 1

bit[10]

CRC Protection

bitstream protected by CRC

bitstream not protected by CRC

bit[9:2]

Reserved

bit[1]

CRC error

no CRC error

CRC error

bit[0]

Invalid frame

no invalid frame´

invalid frame

This location contains bits 15...11 of the original MPEG header and other sta-

tus bits. It will be set each frame directly after the header has been decoded

from the bit stream.

MPEGStatus1

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