AT89C51SND2C_14 Datasheet, PDF (71/242 Pages) ATMEL Corporation – Bass, Medium, and Treble Control (31 Steps)

AT8xC51SND2C/MP3B
Table 13-8. MP3STA1 Register
MP3STA1 (S:AFh) – MP3 Decoder Status Register 1
7
6
5
4
3
2
1
0
-
-
-
MPFREQ MPFREQ
-
-
-
Bit
Bit Number Mnemonic Description
7-5
-
Reserved
The value read from these bits is always 0. Do not set these bits.
MP3 Frame Data Request Flag
4
MPFREQ Set by hardware when MP3 decoder request data.
Cleared when MP3 decoder no more request data .
MP3 Byte Data Request Flag
3
MPBREQ Set by hardware when MP3 decoder request data.
Cleared when writing to MP3DAT.
2-0
-
Reserved
The value read from these bits is always 0. Do not set these bits.
Reset Value = 0001 0001b
Table 13-9. MP3ANC Register
MP3ANC (S:ADh Read Only) – MP3 Ancillary Data Register
7
AND7
6
AND6
5
AND5
4
AND4
3
AND3
2
AND2
1
AND1
Bit
Bit Number Mnemonic Description
7-0
AND7:0
Ancillary Data Buffer
MP3 ancillary data Byte buffer.
Reset Value = 0000 0000b
0
AND0
Table 13-10. MP3VOL Register
MP3VOL (S:9Eh) – MP3 Volume Left Control Register
7
6
5
4
3
2
-
-
-
VOL4
VOL3
VOL2
1
VOL1
Bit
Bit Number Mnemonic Description
7-5
-
Reserved
The value read from these bits is always 0. Do not set these bits.
4-0
VOL4:0
Volume Left Value
Refer to Table 13-2 for the left channel volume control description.
Reset Value = 0000 0000b
0
VOL0
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4341H–MP3–10/07