AT80SND1C-ROTIL datasheet(70/210 Pages) ATMEL

70 / 210 page

AT8xC51SND1C

4109E–8051–06/03

Table 75. MP3STA1 Register

MP3STA1 (S:AFh) – MP3 Decoder Status Register 1

Reset Value = 0001 0001b

Table 76. MP3ANC Register

MP3ANC (S:ADh Read Only) – MP3 Ancillary Data Register

Reset Value = 0000 0000b

Table 77. MP3VOL Register

MP3VOL (S:9Eh) – MP3 Volume Left Control Register

Reset Value = 0000 0000b

7654

3210

MPFREQ

---

Bit

Number

Bit

Mnemonic

Description

7 - 5

Reserved

The value read from these bits is always 0. Do not set these bits.

4MPFREQ

MP3 Frame Data Request Flag

Set by hardware when MP3 decoder request data.

Cleared when MP3 decoder no more request data .

3MPBREQ

MP3 Byte Data Request Flag

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.

7654

3210

AND7

AND6

AND5

AND4

AND3

AND2

AND1

AND0

Bit

Number

Bit

Mnemonic

Description

7 - 0

AND7:0

Ancillary Data Buffer

MP3 ancillary data Byte buffer.

7654

3210

VOL4

VOL3

VOL2

VOL1

VOL0

Bit

Number

Bit

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 69 for the left channel volume control description.

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