ADSP-BF522 AD [Analog Devices], ADSP-BF522 Datasheet - Page 44

• Manufacturer Part Number: ADSP-BF522
• Description: Blackfin Embedded Processor
• Manufacturer: AD [Analog Devices]

ADSP-BF522/523/524/525/526/527
SDRAM Interface Timing
Table 34. SDRAM Interface Timing
1
2
Parameter
Timing Requirements
t
t
Switching Characteristics
t
t
t
t
t
t
t
The t
Command balls 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, Address, Data Delay After CLKOUT
Command, Address, Data Hold After CLKOUT
Data Disable After CLKOUT
Data Enable After CLKOUT
COMMAND, ADDRESS
(OUT)
DATA (OUT)
SCLK
DATA (IN)
CLKOUT
specification discussed in
1
t
Rev. PrG | Page 44 of 80 | February 2009
SSDAT
NOTE: COMMAND = SRAS, SCAS, SWE, SDQM, SMS, SA10, SCKE.
Table 14
Figure 17. SDRAM Interface Timing
and
2
Table
2
t
DCAD
17. Package type and reduced supply voltages affect the best-case values listed here.
t
SCLK
t
t
HSDAT
ENSDAT
12.5
Min
1.5
0.8
2.5
2.5
1.0
0.0
V
ADSP-BF522/524/526
DDMEM
1.8 V
Max
4.4
5.0
=
t
DCAD
t
HCAD
Min
12.5
0.8
2.5
1.0
0.0
1.5
2.5
2.5/3.3 V
V
DDMEM
t
Preliminary Technical Data
HCAD
t
SCLKL
Max
4.4
5.0
=
t
Min
t
DSDAT
1.5
1.0
2.5
2.5
1.0
0.0
SCLKH
10
ADSP-BF523/525/527
V
DDMEM
1.8 V
Max
4.0
5.0
=
Min
1.5
0.8
7.5
2.5
2.5
1.0
0.0
2.5/3.3 V
V
DDMEM
Max Unit
4.0
4.0
=
ns
ns
ns
ns
ns
ns
ns
ns
ns