AT83SND2CMP3 datasheet(11/97 Pages) ATMEL

部品番号	AT83SND2CMP3

部品情報	Single-Chip MP3 Decoder with Full Audio Interface

PDF	97 Pages

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メーカー	ATMEL [ATMEL Corporation]

ホームページ	http://www.atmel.com

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AT83SND2CMP3

7524B–MP3–05/06

F i gure 7 ). Va l ue of the fi l ter c o m ponent s are det ai l ed i n t he S e ct i on “D C

Characteristics”.

The VCO block is the Voltage Controlled Oscillator controlled by the voltage Vref pro-

duced by the charge pump. It generates a square wave signal: the PLL clock.

Figure 6. PLL Block Diagram and Symbol

Figure 7. PLL Filter Connection

PLL Programming

The PLL is programmed using the flow shown in Figure 8. The PLL clock frequency will

depend on MP3 decoder clock and audio interface clock frequencies.

Figure 8. PLL Programming Flow

PLLEN

PLLCON.1

N6:0

N divider

R divider

VCO

PLLclk

OSCclk

()

-----------------------------------------------

OSC

CLOCK

PFLD

PLOCK

PLLCON.0

PFILT

CHP

Vref

Down

R9:0

PLL

CLOCK

PLL Clock Symbol

PLL

Clock

VSS

FILT

VSS

PLL

Programming

Configure Dividers

N6:0 = xxxxxxb

R9:0 = xxxxxxxxxxb

Enable PLL

PLLRES = 0

PLLEN = 1

PLL Locked?

PLOCK = 1?

AT83SND2CMP3 データシート(PDF) 11 Page - ATMEL Corporation

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