
Specifications
External Memory Interface (EMI) DRAM Timing
MOTOROLA
DSP56007/D 2-11
64 Random Read or Write
Cycle Time (Single
Access Only)
t
RC
slow
fast
12
×
T
C
8
×
T
C
240
98.8
—
—
182
121
—
—
136.4
91.0
—
—
ns
ns
65 WR Deassertation to
CAS Assertion
t
RCS
slow
fast
9
×
T
C
– 11
6
×
T
C
– 11
169
109
—
—
125
80
—
—
91.3
57.2
—
—
ns
ns
66 CAS Assertion to WR
Deassertation
t
WCH
slow
fast
3
×
T
C
– 13
2
×
T
C
– 13
47
27
—
—
32
17
—
—
21.1
9.7
—
—
ns
ns
67 Data Valid to CAS
Assertion
(Data Setup Time)
t
DS
T
L
– 6
4
—
2
—
0.1
—
ns
68 CAS Assertion to Data
Not Valid (Data Hold
Time)
t
DH
slow
fast
3
×
T
C
+ T
H
–
14
2
×
T
C
+ T
H
–
14
56
36
—
—
39
24
—
—
25.8
14.4
—
—
ns
ns
69 RAS Assertion to Data
Not Valid
t
DHR
slow
fast
7
×
T
C
+ T
H
–
14
5
×
T
C
+ T
H
–
14
136
96
—
—
100
69
—
—
71.2
48.5
—
—
ns
ns
70 WR Assertion to CAS
Assertion
t
WCS
slow
fast
4
×
T
C
– 14
3
×
T
C
– 14
66
46
—
—
47
31
—
—
31.4
20.1
—
—
ns
ns
71 WR Assertion Pulse
Width (Single Cycle
Only)
t
WP
slow
fast
7
×
T
C
– 9
5
×
T
C
– 9
131
91
—
—
97
67
—
—
70.5
47.8
—
—
ns
ns
72 RAS Assertion to WR
Deassertation
(Single Cycle Only)
t
WCR
slow
fast
7
×
T
C
– 15
5
×
T
C
– 15
125
85
—
—
91
61
—
—
64.5
41.8
—
—
ns
ns
73 WR Assertion to Data
Active
slow
fast
3
×
T
C
+ T
H
–
13
2
×
T
C
+ T
H
–
13
57
37
—
—
40
25
—
—
26.8
15.4
—
—
ns
ns
74 RD or WR Assertion to
RAS Deassertation
(Single Cycle Only)
t
ROH
,
t
RWL
slow
fast
7
×
T
C
– 13
5
×
T
C
– 13
127
87
—
—
93
63
—
—
66.5
43.8
—
—
ns
ns
Note:
1.
n is the number of successive accesses. n = 2, 3, 4, or 6.
Table 2-8
External Memory Interface (EMI) DRAM Timing (Continued)
No.
Characteristics
Symbol
Timing
Mode
Expression
50 MHz
66 MHz
88 MHz
Unit
Min Max Min Max Min Max
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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Summary of Contents for NXP SYMPHONY DSP56007
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