參數(shù)資料
型號: ADSP-BF518BSWZ-4F4
廠商: Analog Devices Inc
文件頁數(shù): 25/68頁
文件大?。?/td> 0K
描述: IC DSP 16/32B 400MHZ LP 176LQFP
標(biāo)準(zhǔn)包裝: 1
系列: Blackfin®
類型: 定點
接口: 以太網(wǎng),I²C,PPI,RSI,SPI,SPORT,UART/USART
時鐘速率: 400MHz
非易失內(nèi)存: 閃存(4Mb)
芯片上RAM: 116kB
電壓 - 輸入/輸出: 1.8V,2.5V,3.3V
電壓 - 核心: 1.30V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 176-LQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 176-LQFP-EP(24x24)
包裝: 托盤
ADSP-BF512/BF512F, BF514/BF514F, BF516/BF516F, BF518/BF518F
Rev. B
|
Page 31 of 68
|
January 2011
SDRAM Interface Timing
Table 28. SDRAM Interface Timing
VDDMEM
1.8V Nominal
VDDMEM
2.5 V/3.3V Nominal
Parameter
Min
Max
Min
Max
Unit
Timing Requirements
tSSDAT
Data Setup Before CLKOUT
1.5
ns
tHSDAT
Data Hold After CLKOUT
1.3
0.8
ns
Switching Characteristics
tSCLK
CLKOUT Period1
1 The tSCLK value is the inverse of the fSCLK specification discussed in Table 11 on Page 21. Package type and reduced supply voltages affect the best-case value listed here.
12.5
10
ns
tSCLKH
CLKOUT Width High
5
4
ns
tSCLKL
CLKOUT Width Low
5
4
ns
tDCAD
Command, Address, Data Delay After CLKOUT
2
2 Command pins/balls include: SRAS, SCAS, SWE, SDQM, SMS, SA10, SCKE.
54
ns
tHCAD
Command, Address, Data Hold After CLKOUT2
11
ns
tDSDAT
Data Disable After CLKOUT
5.5
5
ns
tENSDAT
Data Enable After CLKOUT
0
ns
Figure 12. SDRAM Interface Timing
tSCLK
CLKOUT
tSCLKL
tSCLKH
tSSDAT
tHSDAT
tENSDAT
tDCAD
tDSDAT
tHCAD
tDCAD
tHCAD
DATA (IN)
DATA (OUT)
COMMAND,
ADDRESS
(OUT)
NOTE: COMMAND =
SRAS, SCAS, SWE, SDQM, SMS, SA10, SCKE.
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