AT89C51SND2C-7FTUL Atmel, AT89C51SND2C-7FTUL Datasheet - Page 101

• 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

15.3.3
4341H–MP3–10/07
Precharge Control
The power up of the circuit can be performed independently for several blocks. The sequence
flow starts by setting to High the block specific fastcharge control bit and subsequently the asso-
ciated power control bit. Once the power control bit is set to High, the fast charging starts. This
action begins a user controlled fastcharge cycle. When the fastcharge period is over, the user
must reset the associated fastcharge bit and the block is ready for use. If a power control bit is
cleared a new power up sequence is needed.
The several blocks with independent power control are identified in Table 15-29. The table
describes the power on control and fastcharge bits for each block.
Table 15-29. Precharge and Power Control
Note:
Auxiliary input amplifier
Right line out amplifier
Right D-to-A converter
Vref & Vcm generator
Right line in amplifier
Left line out amplifier
Left D-to-A converter
Powered up block
Left line in amplifier
Note that all block can be precharged simultaneously.
PA Driver output
Power on control bit
ONPADRV
ONAUXIN
ONDACL
ONMSTR
ONLNOR
ONDACR
ONLNOL
ONLNIR
ONLNIL
AT8xC51SND2C/MP3B
Precharge Control Bit
PRCHARGEPADRV
PRCHARGEAUXIN
PRCHARGELNOR
PRCHARGELNOL
PRCHARGELNIR
PRCHARGELNIL
PRCHARGE
(reg 12; bit 1)
Not needed
Not needed
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