AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 98

• 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

15.2
15.2.1
98
Power Amplifier
AT8xC51SND2C/MP3B
PA Features
Table 15-25. DAC Reset Register - DAC_ RST (10h)
Reset Value = 00000000b
Note:
High quality mono output is provided. The DAC output is connected through a buffer stage to the
input of the Audio Power Amplifier, using two coupling capacitors The mono buffer stage also
includes a mixer of the LINEL and LINER inputs as well as a differential monaural auxiliary input
(line level) which can be, for example, the output of a voice CODEC output driver in mobile
phones.
In the full power mode, the Power Amplifier is capable of driving an 8Ω Loudspeaker at maxi-
mum power of 440mW, making it suitable as a handsfree speaker driver in Wireless Handset
Application.
The Low Power Mode is designed to be switched from the handsfree mode to the normal ear-
phone/speaker mode of a telephone handset.
The audio power amplifier is not internally protected against short-circuit. The user should avoid
any short-circuit on the load.
•
•
•
•
Table 15-26. PA Gain
0.44W on 8
Low Power Mode for Earphone
Programmable Gain (-22 to +20 dB)
Fully Differential Structure, Input and Output
Number
7
-
7:3
2
1
0
Bit
Refer to Audio DAC Startup sequence.
Ω
Load
Bit Mnemonic
APAGAIN 3:0
6
-
RESMASK
RESFILZ
RSTZ
0000
0001
0010
0100
0101
0011
-
5
-
Description
Not Used.
Active high reset mask of the audio codec
Active low reset of the audio codec filter
Active low reset of the audio codec
4
-
3
-
RESMASK
2
Gain (db)
-22
20
17
14
11
8
RESFILZ
1
4341H–MP3–10/07
RSTZ
0