MAS 35x9F
DATA SHEET
Table 3–11: D0 status memory cells
Memory
Address
Function
Name
D0:FCF
D0:FD0
AAC bitrate in bit/s
AACbitrate
MPEG Frame Counter
MPEGFrameCount
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’.
D0:FD1
MPEG Header and Status Information
MPEGStatus1
bit[15]
reserved, must be set to zero
bit[14:13]
MPEG ID, Bits 12, 11 of the MPEG header
00
01
10
11
MPEG 2.5
reserved
MPEG 2
MPEG 1
not valid in case of AAC decoding (bit[12:11] = 00)
bit[12:11]
bit[10]
Bits 14 and 13 of the MPEG header
00
01
10
11
AAC
Layer 3
Layer 2
Layer 1
CRC Protection
0
1
bitstream protected by CRC
bitstream not protected by CRC
bit[9:2]
bit[1]
Reserved
CRC error
0
1
no CRC error
CRC error
bit[0]
Invalid frame
0
1
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.
40
June 30, 2004; 6251-505-1DS
Micronas
MICRONAS [ MICRONAS ]
