參數(shù)資料
型號(hào)： AT85C51SND3B1-7FTUL
廠商： Atmel
文件頁數(shù)： 42/119頁
文件大小： 0K
描述： IC DECODER/ENCODER DGTL 100CBGA
標(biāo)準(zhǔn)包裝： 90
類型： 音頻編碼器/解碼器
應(yīng)用： 移動(dòng)電話，手機(jī)，視頻顯示器
電壓 - 電源，數(shù)字： 1.65 V ~ 3.6 V
安裝類型： 表面貼裝
封裝/外殼： 100-TFBGA
供應(yīng)商設(shè)備封裝： 100-CTBGA（9x9）
包裝： 托盤
29
AT85C51SND3B
7632D–MP3–01/07
Figure 16. Crystal Connection
Clock Generator
The clock generator provides the oscillator and higher frequency clocks to the System,
the DFC, the memory controllers: Nand Flash and MMC controllers, the USB and the
high speed Serial I/O port. It is based on a 480 MHz PLL namely the PLL clock followed
by a frequency divider giving a broad range of available clock frequency: the CLOCK
GEN clocks.
The clock generation is enabled by setting CKGENE bit in CKEN (see Table 32).
The PLL is enabled by setting PLLEN bit in CKEN and reports a filtered lock status by
the PLOCK Flag in CKEN.
As soon as the PLL is locked, the generated clocks can be used by the peripherals as
detailed in the following sections.
Figure 17. Clock Generator Block Diagram and Symbol
480 MHz PLL
The PLL is based on a Phase Frequency Comparator and Lock Detector block (PFLD)
which makes the comparison between the reference clock coming from the 4-bit N
divider (PLLN3:0 + 1 in PLLCLK) and the reverse clock coming from either fixed fre-
quencies or the 4-bit R divider (PLLR3:0 + 1 in PLLCLK) and generates some pulses on
the Up or Down signal depending on the edge position of the reverse clock. These
pulses feed the Charge Pump block (CHP) that generates a voltage reference to the
480 MHz Voltage Controlled Oscillator (VCO) by injecting or extracting charges from an
internal filter. The reverse clock selection mechanism is implemented in order to support
many oscillator frequencies and to minimize the PLL output jitter.
APVSS
X1
X2
Q
C1
C2
Clock
CKGENE
CKEN.7
480 MHz PLL
OSC
CLOCK
PLOCK
CKEN.4
PLLEN
CKEN.6
CLOCK
GEN
Clock Generator Symbol
Generator
Divider
60 MHz
48 MHz
40 MHz
30 MHz
24 MHz
20 MHz
16 MHz
PLL Clock
OSC
120 MHz
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT85C51SND3B1N-DDV 功能描述:音頻 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
AT85C51SND3B1N-RTTUL 功能描述:音頻 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
AT85C51SND3B1-RTTUL 功能描述:音頻 DSP MP3/WMA USB2.0 w/o DAC+DC/DC RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
AT85C51SND3B2-RTTUL 功能描述:音頻 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
AT85C51SND3BX 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:MP3 Microcontrollers
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