AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 74

• Manufacturer Part Number: AT89C51SND2C-7FTUL
• Description: IC 8051 MCU FLASH 64K MP3 100BGA
• Manufacturer: Atmel
• Series: 89Cr

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

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