
2-10
DSP56007/D MOTOROLA
Specifications
External Memory Interface (EMI) DRAM Timing
54 CAS Deassertation Pulse
Width
(Page Mode Access
Only)
T
CP
T
C
– 5
15
—
10
—
6.4
—
ns
55 Row Address Valid to
RAS Assertion
(Row Address Setup
Time)
t
ASR
T
L
– 6
4
—
2
—
0.1
—
ns
56 RAS Assertion to ROW
Address Not Valid
(Row Address Hold
Time)
t
RAH
slow
fast
3
×
T
C
+ T
H
–
14
2
×
T
C
+ T
H
–
14
56
36
—
—
39
24
—
—
25.8
14.4
—
—
ns
ns
57 Column Address Valid
to CAS Assertion
(Column Address Setup
Time)
t
ASC
T
L
– 6
4
—
2
—
0.1
—
ns
58 CAS Assertion to
Column Address Not
Valid
(Column Address Hold
Time)
T
CAH
slow
fast
3
×
T
C
+ T
H
–
14
2
×
T
C
+ T
H
–
14
56
36
—
—
39
24
—
—
25.8
14.4
—
—
ns
ns
59 Last CAS Assertion to
Column Address Not
Valid (Column Address
Hold Time)
T
CAH
slow
fast
7
×
T
C
+ T
H
–
14
4 ×
T
C
+ T
H
–
14
136
76
—
—
100
54
—
—
71.2
37.1
—
—
ns
ns
60 RAS Assertion to
Column Address Not
Valid
t
AR
slow
fast
7
×
T
C
+ T
H
–
14
5
×
T
C
+ T
H
–
14
136
96
—
—
100
69
—
—
71.2
48.5
—
—
ns
ns
61 Column Address Valid
to RAS Deassertation
t
RAL
slow
fast
3
×
T
C
+ T
L
–
7
2
×
T
C
+ T
L
–
7
63
43
—
—
46
30
—
—
32.8
21.2
—
—
ns
ns
62 CAS, RAS, RD, or WR
Deassertation to WR or
RD Assertion
t
RCH
,
t
RRH
slow
fast
5
×
T
C
– 11
3
×
T
C
– 11
89
49
—
—
65
35
—
—
45.8
23.1
—
—
ns
ns
63 CAS or RD
Deassertation to Data
Not Valid
(Data Hold Time)
t
OFF
,
t
GZ
0
0
—
0
—
0
—
ns
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
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
.
..
Summary of Contents for NXP SYMPHONY DSP56007
Page 82: ......