參數(shù)資料
型號(hào): ADSP-BF531SBBZ400
廠商: ANALOG DEVICES INC
元件分類: 數(shù)字信號(hào)處理
英文描述: Blackfin Embedded Processor
中文描述: 16-BIT, 40 MHz, OTHER DSP, PBGA169
封裝: ROHS COMPLIANT, PLASTIC, MO-034AAG-2, BGA-169
文件頁(yè)數(shù): 25/56頁(yè)
文件大?。?/td> 671K
代理商: ADSP-BF531SBBZ400
ADSP-BF531/ADSP-BF532/ADSP-BF533
Rev. 0
|
Page 25 of 56
|
March 2004
SDRAM Interface Timing
Table 18. SDRAM Interface Timing
1
1
For V
DDINT
= 1.2 V.
2
Command pins include: SRAS, SCAS, SWE, SDQM, SMS, SA10, SCKE.
Parameter
Timing Requirements
t
SSDAT
t
HSDAT
Switching Characteristics
t
SCLK
t
SCLKH
t
SCLKL
t
DCAD
t
HCAD
t
DSDAT
t
ENSDAT
Min
Max
Unit
DATA Setup Before CLKOUT
DATA Hold After CLKOUT
2.1
0.8
ns
ns
CLKOUT Period
CLKOUT Width High
CLKOUT Width Low
Command, ADDR, Data Delay After CLKOUT
2
Command, ADDR, Data Hold After CLKOUT
1
Data Disable After CLKOUT
Data Enable After CLKOUT
7.5
2.5
2.5
ns
ns
ns
ns
ns
ns
ns
6.0
0.8
6.0
1.0
Figure 13. SDRAM Interface Timing
t
HCAD
t
HCAD
t
DSDAT
t
DCAD
t
SSDAT
t
DCAD
t
ENSDAT
t
HSDAT
t
SCLKL
t
SCLKH
t
SCLK
CLKOUT
DATA (IN)
DATA(OUT)
CMND ADDR
(OUT)
NOTE: COMMAND =
SRAS
,
SCAS
,
SWE
, SDQM,
SMS
, SA10, SCKE.
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