AT89C51SND1C-ROTUL Atmel, AT89C51SND1C-ROTUL Datasheet - Page 66
![IC 8051 MCU FLASH 64K MP3 80TQFP](/photos/12/13/121358/313-80-tqfp_sml.jpg)
AT89C51SND1C-ROTUL
Manufacturer Part Number
AT89C51SND1C-ROTUL
Description
IC 8051 MCU FLASH 64K MP3 80TQFP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT80C51SND1C-ROTIL.pdf
(213 pages)
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
-
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13.2.2
13.2.3
13.3
13.3.1
13.3.2
13.3.3
66
Decoding Errors
AT8xC51SND1C
Equalization Control
Special Effect
Layer Error
Synchronization Error
CRC Error
Table 70. Volume Control
Sound can be adjusted using a 3-band equalizer: a bass band under 750 Hz, a medium band
from 750 Hz to 3300 Hz and a treble band over 3300 Hz. The MP3BAS, MP3MED, and
MP3TRE registers allow a 32-step gain control in each band according to Table 71.
Table 71. Bass, Medium, Treble Control
The MPBBST bit in MP3CON register allows enabling of a bass boost effect with the following
characteristics: gain increase of +9 dB in the frequency under 375 Hz.
The three different errors that can appear during frame processing are detailed in the following
sections. All these errors can trigger an interrupt as explained in Section "Interrupt", page 67.
The ERRSYN flag in MP3STA is set when a non-supported layer is decoded in the header of the
frame that has been sent to the decoder.
The ERRSYN flag in MP3STA is set when no synchronization pattern is found in the data that
have been sent to the decoder.
When the CRC of a frame does not match the one calculated, the flag ERRCRC in MP3STA is
set. In this case, depending on the CRCEN bit in MP3CON, the frame is played or rejected. In
both cases, noise may appear at audio output.
BAS4:0 or MED4:0 or TRE4:0
VOL4:0 or VOR4:0
00000
00001
00010
00000
00001
00010
11110
11110
11111
11111
Volume Gain (dB)
Gain (dB)
Mute
+1.5
-1.5
-33
-27
-14
-10
- ∞
+1
0
4109L–8051–02/08
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