參數(shù)資料
型號: AT89C51SND2C-7FTUL
廠商: Atmel
文件頁數(shù): 20/160頁
文件大小: 0K
描述: IC 8051 MCU FLASH 64K MP3 100BGA
標(biāo)準(zhǔn)包裝: 260
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40MHz
連通性: I²C,IDE/ATAPI,MMC,SPI,UART/USART,USB
外圍設(shè)備: 音頻,I²S,MP3,PCM,POR,WDT
輸入/輸出數(shù): 32
程序存儲器容量: 64KB(64K x 8)
程序存儲器類型: 閃存
RAM 容量: 2.25K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 3.3 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 100-TFBGA
包裝: 托盤
其它名稱: AT89C51SND2C7FTUL
15
4341H–MP3–10/07
AT8xC51SND2C/MP3B
Figure 5-4.
PLL Block Diagram and Symbol
Figure 5-5.
PLL Filter Connection
5.3.2
PLL Programming
The PLL is programmed using the flow shown in Figure 5-6. As soon as clock generation is
enabled, the user must wait until the lock indicator is set to ensure the clock output is stable. The
PLL clock frequency will depend on MP3 decoder clock and audio interface clock frequencies.
Figure 5-6.
PLL Programming Flow
PLLEN
PLLCON.1
N6:0
N divider
R divider
VCO
PLLclk
OSCclk
R
1
+
(
)
×
N
1
+
-----------------------------------------------
=
OSC
CLOCK
PFLD
PLOCK
PLLCON.0
PFILT
CHP
Vref
Up
Down
R9:0
PLL
CLOCK
PLL Clock Symbol
PLL
Clock
VSS
FILT
R
C1
C2
VSS
PLL
Programming
Configure Dividers
N6:0 = xxxxxxb
R9:0 = xxxxxxxxxxb
Enable PLL
PLLRES = 0
PLLEN = 1
PLL Locked?
PLOCK = 1?
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