MAS3587F datasheet(38/82 Pages) MICRONAS

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MAS 3587F

ADVANCE INFORMATION

Micronas

Table 3–8: D0 Status Memory Cells

Memory

Address

Function

Name

D0:FD0

MPEG Frame Counter

All

bit[19:0]

number of MPEG frames after synchronization

The counter will be incremented with every new frame that is encoded/

decoded. With an invalid MPEG bit stream at its input while decoding (e.g. an

invalid header is detected), the MAS 3587F resets the MPEGFrameCount to

‘0’. In encoding mode, the counter is reset on audio data timeouts and after

restarting the encoder.

MPEGFrameCount

D0:FD1

MPEG Header and Status Information

All

bit[15]

reserved, must be set to zero

bit[14:13]

MPEG ID, Bits 12, 11 of the MPEG header

MPEG 2.5 (decoding only)

reserved

MPEG 2

MPEG 1

bit[12:11]

Bits 14 and 13 of the MPEG header

reserved

Layer 3

Layer 2 (decoding only)

Layer 1 (decoding only)

bit[10]

CRC Protection

bitstream protected by CRC

bitstream not protected by CRC

bit[9:2]

Reserved

bit[1]

CRC error (decoding only)

no CRC error

CRC error

bit[0]

Invalid frame (decoding only)

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 encoded/

decoded from the bit stream.

MPEGStatus1

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