參數(shù)資料
型號: SPAKD56366PV120
廠商: MOTOROLA INC
元件分類: 數(shù)字信號處理
英文描述: 24-BIT, 120 MHz, OTHER DSP, PQFP144
封裝: TQFP-144
文件頁數(shù): 99/147頁
文件大?。?/td> 2156K
代理商: SPAKD56366PV120
Specifications
External Memory Expansion Port (Port A)
MOTOROLA
DSP56366 Advance Information
2-25
Table 2-12 DRAM Page Mode Timings, Four Wait States1, 2, 3
No.
Characteristics
Symbol
Expression
Min
Max
131
Page mode cycle time for two consecutive accesses of the same
direction.
tPC
5
× TC
41.7
ns
Page mode cycle time for mixed (read and write) accesses
4.5
× TC
37.5
132
CAS assertion to data valid (read)
tCAC
2.75
× TC 7.0
15.9
ns
133
Column address valid to data valid (read)
tAA
3.75
× TC 7.0
24.2
ns
134
CAS deassertion to data not valid (read hold time)
tOFF
0.0
ns
135
Last CAS assertion to RAS deassertion
tRSH
3.5
× TC 4.0
25.2
ns
136
Previous CAS deassertion to RAS deassertion
tRHCP
6
× TC 4.0
46.0
ns
137
CAS assertion pulse width
tCAS
2.5
× TC 4.0
16.8
ns
138
Last CAS deassertion to RAS assertion5
BRW[1:0] = 00
tCRP
2.75
× TC 6.0
ns
BRW[1:0] = 01
4.25
× TC 6.0
BRW[1:0] = 10
5.25
× TC 6.0
37.7
BRW[1:0] = 11
7.25
× TC 6.0
54.4
139
CAS deassertion pulse width
tCP
2
× TC 4.0
12.7
ns
140
Column address valid to CAS assertion
tASC
TC 4.0
4.3
ns
141
CAS assertion to column address not valid
tCAH
3.5
× TC 4.0
25.2
ns
142
Last column address valid to RAS deassertion
tRAL
5
× TC 4.0
37.7
ns
143
WR deassertion to CAS assertion
tRCS
1.25
× TC 4.0
6.4
ns
144
CAS deassertion to WR assertion
tRCH
1.25
× TC 4.0
6.4
ns
145
CAS assertion to WR deassertion
tWCH
3.25
× TC 4.2
22.9
ns
146
WR assertion pulse width
tWP
4.5
× TC 4.5
33.0
ns
147
Last WR assertion to RAS deassertion
tRWL
4.75
× TC 4.3
35.3
ns
148
WR assertion to CAS deassertion
tCWL
3.75
× TC 4.3
26.9
ns
149
Data valid to CAS assertion (write)
tDS
0.5
× TC 4.0
0.2
ns
150
CAS assertion to data not valid (write)
tDH
3.5
× TC 4.0
25.2
ns
151
WR assertion to CAS assertion
tWCS
1.25
× TC 4.3
6.1
ns
152
Last RD assertion to RAS deassertion
tROH
4.5
× TC 4.0
33.5
ns
153
RD assertion to data valid
tGA
3.25
× TC 7.0
20.1
ns
154
RD deassertion to data not valid6
tGZ
0.0
ns
155
WR assertion to data active
0.75
× TC 0.3
5.9
ns
156
WR deassertion to data high impedance
0.25
× TC
—2.1
ns
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