AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 74
AT89C51SND2C-7FTUL
Manufacturer Part Number
AT89C51SND2C-7FTUL
Description
IC 8051 MCU FLASH 64K MP3 100BGA
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51SND2C-7FTUL.pdf
(242 pages)
Specifications of AT89C51SND2C-7FTUL
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
32
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; D/A 2x20b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TFBGA
Data Bus Width
8 bit
Data Ram Size
2.25 KB
Interface Type
ATAPI, I2S, IDE, SPI, UART, USB
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
32
Number Of Timers
2
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
Other names
AT89C51SND2C7FTUL
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Manufacturer
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Price
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14. Audio Output Interface
14.1
Figure 14-1. Audio Interface Block Diagram
74
MP3 Decoder
Request To
Audio Data
Audio Data
From MP3
From C51
Description
Decoder
CLOCK
AT8xC51SND2C/MP3B
Sample
AUD
AUDCON1.0
16
AUDEN
8
The AT8xC51SND2C implement an audio output interface allowing the audio bitstream to be
output in various formats. It is compatible with right and left justification PCM and I
and thanks to the on-chip PLL (see Section “Clock Controller”, page 13) allows connection of
almost all of the commercial audio DAC families available on the market.
The audio bitstream can be from 2 different types:
•
•
The C51 core interfaces to the audio interface through five special function registers: AUDCON0
and AUDCON1, the Audio Control registers (see Table 14-3 and Table 14-4); AUDSTA, the
Audio Status register (see Table 14-5); AUDDAT, the Audio Data register (see Table 14-6); and
AUDCLK, the Audio Clock Divider register (see Table 14-7).
Figure 14-1 shows the audio interface block diagram, blocks are detailed in the following
sections.
MP3 Buffer
Audio Buffer
AUDCON1.2:1
The MP3 decoded bitstream coming from the MP3 decoder for playing songs.
The audio bitstream coming from the MCU for outputting voice or sounds.
AUDDAT
Data Ready
DUP1:0
AUDCON1.6
DRQEN
AUDCON0.0
HLR
Clock Generator
16
16
AUBUSY
AUDSTA.7
AUDSTA.6
AUDSTA.5
UDRN
SREQ
AUDCON0.1
AUDCON1.7
DSIZ
SRC
0
1
Data Converter
AUDCON0.7:3
JUST4:0
AUDCON0.2
POL
0
1
To DAC
4341H–MP3–10/07
2
S formats
SCLK
DOUT
DCLK
DSEL
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