參數(shù)資料
型號: DSP56858E
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: 16-bit Digital Signal Controllers
中文描述: 16位數(shù)字信號控制器
文件頁數(shù): 32/64頁
文件大?。?/td> 956K
代理商: DSP56858E
56858 Technical Data, Rev. 6
32
Freescale Semiconductor
Table 4-7 External Memory Interface Timing
Operating Conditions: V
SS
= V
SSIO
= V
SSA
= 0 V, V
DD
= 1.62-1.98 V, V
DDIO
= V
DDA
=
3.0–3.6V, T
A
= –40× to +120×C, C
L
£ 50pF, P = 8.333ns
Characteristic
Symbol
Wait States
Configuration
D
M
Wait States
Controls
Unit
Address Valid to WR Asserted
t
AWR
WWS=0
-0.79
0.50
WWSS
ns
WWS>0
-1.98
0.69
WR Width Asserted to WR
Deasserted
t
WR
WWS=0
-0.86
0.19
WWS
ns
WWS>0
-0.01
0.00
Data Out Valid to WR Asserted
t
DWR
WWS=0
-1.52
0.00
WWSS
ns
WWS=0
- 5.69
0.25
WWS>0
-2.10
0.19
WWS>0
-4.66
0.50
Valid Data Out Hold Time after WR
Deasserted
t
DOH
-1.47
0.25
WWSH
ns
Valid Data Out Set Up Time to WR
Deasserted
t
DOS
-2.36
0.19
WWS,WWSS
ns
-4.67
0.50
Valid Address after WR
Deasserted
t
WAC
-1.60
0.25
WWSH
RD Deasserted to Address Invalid
t
RDA
- 0.44
0.00
RWSH
ns
Address Valid to RD Deasserted
t
ARDD
-2.07
1.00
RWSS,RWS
ns
Valid Input Data Hold after RD
Deasserted
t
DRD
0.00
N/A
1
1.
N/A since device captures data before it deasserts RD
ns
RD Assertion Width
t
RD
-1.34
1.00
RWS
ns
Address Valid to Input Data Valid
t
AD
-10.27
1.00
RWSS,RWS
ns
-13.5
1.19
Address Valid to RD Asserted
t
ARDA
- 0.94
0.00
RWSS
ns
RD Asserted to Input Data Valid
t
RDD
-9.53
1.00
RWSS,RWS
ns
-12.64
1.19
WR Deasserted to RD Asserted
t
WRRD
-0.75
0.25
WWSH,RWSS
ns
RD Deasserted to RD Asserted
t
RDRD
-0.16
2
2.
If RWSS = RWSH = 0, RD does not deassert during back-to-back reads and D=0.00 should be used.
0.00
RWSS,RWSH
ns
WR Deasserted to WR Asserted
t
WRWR
WWS=0
-0.44
0.75
WWSS, WWSH
ns
WWS>0
-0.11
1.00
RD Deasserted to WR Asserted
t
RDWR
0.14
0.50
MDAR, BMDAR,
RWSH, WWSS
ns
-0.57
0.69
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