ADSP-BF537 AD [Analog Devices], ADSP-BF537 Datasheet - Page 31

• Manufacturer Part Number: ADSP-BF537
• Description: Blackfin Embedded Processor
• Manufacturer: AD [Analog Devices]

SDRAM Interface Timing
Table 21. SDRAM Interface Timing
1
2
Parameter
Timing Requirements
t
t
Switching Characteristics
t
t
t
t
t
t
t
The t
Command pins include: SRAS, SCAS, SWE, SDQM, SMS, SA10, SCKE.
SSDAT
HSDAT
SCLK
SCLKH
SCLKL
DCAD
HCAD
DSDAT
ENSDAT
SCLK
value is the inverse of the f
DATA Setup Before CLKOUT
DATA Hold After CLKOUT
CLKOUT Period
CLKOUT Width High
CLKOUT Width Low
Command, ADDR, Data Delay After CLKOUT
Command, ADDR, Data Hold After CLKOUT
Data Disable After CLKOUT
Data Enable After CLKOUT
COMMAND ADDR
DATA (OUT)
(OUT)
DATA (IN)
CLKOUT
SCLK
specification discussed in
1
t
SSDAT
NOTE: COMMAND = SRAS, SCAS, SWE, SDQM, SMS, SA10, SCKE.
Rev. B | Page 31 of 68 | July 2006
Table
Figure 13. SDRAM Interface Timing
16. Package type and reduced supply voltages affect the best-case value of 7.5 ns listed here.
2
2
t
DCAD
t
SCLK
t
t
HSDAT
ENSDAT
ADSP-BF534/ADSP-BF536/ADSP-BF537
t
DCAD
t
HCAD
t
HCAD
t
SCLKL
t
t
DSDAT
SCLKH
Min
1.5
0.8
7.5
2.5
2.5
1.0
1.0
Max
4.0
6.0
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns