AT89C51SND1C-ROTUL Atmel, AT89C51SND1C-ROTUL Datasheet - Page 79

• Manufacturer Part Number: AT89C51SND1C-ROTUL
• Description: IC 8051 MCU FLASH 64K MP3 80TQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51SND1C-ROTUL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IDE/ATAPI, MMC, SPI, UART/USART, USB
• Peripherals: Audio, I²S, MP3, PCM, POR, WDT
• Number Of I /o: 44
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 2x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

4109L–8051–02/08
Reset Value = 0000 1000b
Table 86. AUDCON1 Register
AUDCON1 (S:9Bh) – Audio Interface Control Register 1
Reset Value = 1011 0010b
Table 87. AUDSTA Register
AUDSTA (S:9Ch Read Only) – Audio Interface Status Register
Number
Number
SREQ
SRC
7 - 3
2 - 1
Bit
Bit
2
1
0
7
7
6
5
4
3
0
7
Mnemonic Description
Mnemonic Description
JUST4:0
DRQEN
DRQEN
MSREQ
MUDRN
DUP1:0
AUDEN
UDRN
DSIZ
POL
HLR
SRC
Bit
Bit
6
6
-
Audio Stream Justification Bits
Refer to Section "Data Converter", page 75 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 84 for bits description.
Audio Interface Enable Bit
Set to enable the audio interface.
Clear to disable the audio interface.
AUBUSY
MSREQ
5
5
MUDRN
4
4
-
3
3
-
-
AT8xC51SND1C
DUP1
2
2
-
DUP0
1
1
-
2
S mode).
AUDEN
0
0
-
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