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参数资料
型号： MC56F8357VPY60
厂商： FREESCALE SEMICONDUCTOR INC
元件分类： 数字信号处理
英文描述： 16-BIT, 120 MHz, OTHER DSP, PQFP160
封装： PLASTIC, LQFP-160
文件页数： 50/177页
文件大小： 4091K
代理商： MC56F8357VPY60
External Memory Interface Timing
56F8357 Technical Data, Rev. 15
Freescale Semiconductor
143
Preliminary
Table 10-16 External Memory Interface Timing
Characteristic
Symbol
Wait States
Configuration
DM
Wait States
Controls
Unit
Address Valid to WR Asserted
tAWR
WWS=0
-1.477
0.50
WWSS
ns
WWS>0
-1.564
0.75 + DCAOE
WR Width Asserted to WR
Deasserted
tWR
WWS=0
-0.186
0.25 + DCAOE
WWS
ns
WWS>0
-0.256
0
Data Out Valid to WR Asserted
tDWR
WWS=0
-9.568
0.25 + DCAEO
WWSS
ns
WWS=0
-1.721
0.00
WWS>0
-9.227
0.50
WWS>0
-1.808
0.25 + DCAOE
Valid Data Out Hold Time after WR
Deasserted
tDOH
-2.287
0.25 + DCAEO
WWSH
ns
Valid Data Out Set-Up Time to
WR Deasserted
tDOS
-1.622
0.25 + DCAOE
WWS,WWSS
ns
-9.041
0.50
Valid Address after WR
Deasserted
tWAC
-3.918
0.25 + DCAEO
WWSH
ns
RD Deasserted to Address Invalid
tRDA
-2.229
0.00
RWSH
ns
Address Valid to RD Deasserted
tARDD
-1.887
1.00
RWSS,RWS
ns
Valid Input Data Hold after RD
Deasserted
tDRD
0.00
N/A1
1. N/A, since device captures data before it deasserts RD
—
ns
RD Assertion Width
tRD
0.212
1.00
RWS
ns
Address Valid to Input Data Valid
tAD
-14.427
1.00
RWSS,RWS
ns
-19.751 1.25 + DCAOE
Address Valid to RD Asserted
tARDA
-2.121
0.00
RWSS
ns
RD Asserted to Input Data Valid
tRDD
-12.306
1.00
RWSS,RWS
ns
-17.630 1.25 + DCAOE
WR Deasserted to RD Asserted
tWRRD
-1.923
0.25 + DCAEO WWSH,RWSS
ns
RD Deasserted to RD Asserted
tRDRD
-0.2342
2. If RWSS = RWSH = 0, and the chip select does not change, then RD does not deassert during back-to-back reads.
0.00
RWSS,RWSH
MDAR3, 4
3. Substitute BMDAR for MDAR if there is no chip select
4. MDAR is active in this calculation only when the chip select changes.
ns
WR Deasserted to WR Asserted
tWRWR
WWS=0
-1.279
0.75 + DCAEO
WWSS, WWSH
ns
WWS>0
-0.938
1.00
RD Deasserted to WR Asserted
tRDWR
WWS=0
-0.046
0.50
RWSH, WWSS,
MDAR3
ns
WWS>0
0.052
0.75 + DCAOE
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:
MC56F8357,
MC56F8157
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