AT83C51SND1C_03 ATMEL [ATMEL Corporation], AT83C51SND1C_03 Datasheet - Page 78

• Manufacturer Part Number: AT83C51SND1C_03
• Description: Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface
• Manufacturer: ATMEL [ATMEL Corporation]

Registers
78
AT8xC51SND1C
Table 84. AUDCON0 Register
AUDCON0 (S:9Ah) – Audio Interface Control Register 0
Reset Value = 0000 1000b
Table 85. AUDCON1 Register
AUDCON1 (S:9Bh) – Audio Interface Control Register 1
Reset Value = 1011 0010b
Number
Number
JUST4
SRC
7 - 3
2 - 1
Bit
Bit
7
7
2
1
0
7
6
5
4
3
0
Mnemonic Description
Mnemonic Description
JUST4:0
DRQEN
MUDRN
DRQEN
MSREQ
JUST3
DUP1:0
AUDEN
DSIZ
SRC
POL
HLR
Bit
Bit
6
6
-
Audio Stream Justification Bits
Refer to Section "Data Converter", page 74 for bits description.
DSEL Signal Output Polarity
Set to output the left channel on high level of DSEL output (PCM mode).
Clear to output the left channel on the low level of DSEL output (I
Audio Data Size
Set to select 32-bit data output format.
Clear to select 16-bit data output format.
High/Low Rate Bit
Set by software when the PLL clock frequency is 384·Fs.
Clear by software when the PLL clock frequency is 256·Fs.
Audio Source Bit
Set to select C51 as audio source for voice or sound playing.
Clear to select the MP3 decoder output as audio source for song playing.
MP3 Decoded Data Request Enable Bit
Set to enable data request to the MP3 decoder and to start playing song.
Clear to disable data request to the MP3 decoder.
Audio Sample Request Flag Mask Bit
Set to prevent the SREQ flag from generating an audio interrupt.
Clear to allow the SREQ flag to generate an audio interrupt.
Audio Sample Under-run Flag Mask Bit
Set to prevent the UDRN flag from generating an audio interrupt.
Clear to allow the UDRN flag to generate an audio interrupt.
Reserved
The value read from this bit is always 0. Do not set this bit.
Audio Duplication Factor
Refer to Table 83 for bits description.
Audio Interface Enable Bit
Set to enable the audio interface.
Clear to disable the audio interface.
MSREQ
JUST2
5
5
MUDRN
JUST1
4
4
JUST0
3
3
-
DUP1
POL
2
2
DUP0
DSIZ
1
1
4109E–8051–06/03
2
S mode).
AUDEN
HLR
0
0