參數(shù)資料
型號(hào): ADSP-BF548BBCZ-5A
廠商: ANALOG DEVICES INC
元件分類: 數(shù)字信號(hào)處理
英文描述: 533 MHz Blackfin Embedded Processor: ADSP-BF548BBCZ-5A Temp Range: –40°C to +85°C Package: 400-Ball CSP_BGA BC-400-1
中文描述: 16-BIT, 50 MHz, OTHER DSP, PBGA400
封裝: 17 X 17 MM, ROHS COMPLIANT, CSBGA-400
文件頁(yè)數(shù): 45/100頁(yè)
文件大?。?/td> 3095K
代理商: ADSP-BF548BBCZ-5A
ADSP-BF542/ADSP-BF544/ADSP-BF547/ADSP-BF548/ADSP-BF549
Rev. D
|
Page 49 of 100
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May 2011
DDR SDRAM/Mobile DDR SDRAM Write Cycle Timing
Table 33 and Figure 20 describe DDR SDRAM/mobile DDR
SDRAM write cycle timing.
Table 33. DDR SDRAM/Mobile DDR SDRAM Write Cycle Timing
DDR SDRAM
Mobile DDR SDRAM
Parameter
Min
Max
Min
Max
Unit
Switching Characteristics
tDQSS
Write CMD to First DQS0-1
0.75
1.25
0.75
1.25
tCK
tDS
DQ0-15/DQM0-1 Setup to DQS0-1
0.90
ns
tDH
DQ0-15/DQM0-1 Hold to DQS0-1
0.90
ns
tDSS
DQS0-1 Falling to DCK0-1 Rising (DQS0-1 Setup)
0.20
tCK
tDSH
DQS0-1 Falling from DCK0-1 Rising (DQS0-1 Hold)
0.20
tCK
tDQSH
DQS0-1 High Pulse Width
0.35
0.40
0.60
tCK
tDQSL
DQS0-1 Low Pulse Width
0.35
0.40
0.60
tCK
tWPRE
DQS0-1 Write Preamble
0.25
tCK
tWPST
DQS0-1 Write Postamble
0.40
0.60
0.40
0.60
tCK
tDOPW
DQ0-15 and DQM0-1 Output Pulse Width (for Each)
1.75
ns
Figure 20. DDR SDRAM /Mobile DDR SDRAM Controller Write Cycle Timing
DCK0-1
DQS0-1
DQ0-15/DQM0-1
tDQSS
tDSH
tDSS
tDQSL
tDQSH
tWPST
tWPRE
tDS
tDH
tDOPW
CONTROL
Write CMD
Dn
Dn+1
Dn+2
Dn+3
NOTE: CONTROL =
DCS0-1, DCLKE, DRAS, DCAS, AND DWE.
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ADSP-BF549BBCZ 制造商:Analog Devices 功能描述:
ADSP-BF549BBCZ-ENG 制造商:Analog Devices 功能描述:- Bulk