dsp56004 Freescale Semiconductor, Inc, dsp56004 Datasheet - Page 34

• Manufacturer Part Number: dsp56004
• Description: Symphonytm Audio Dsp Family 24-bit Digital Signal Processors
• Manufacturer: Freescale Semiconductor, Inc

No.
Specifications
External Memory Interface (EMI) DRAM Timing
2-10
54 CAS Deassertation Pulse
55 Row Address Valid to
56 RAS Assertion to ROW
57 Column Address Valid
58 CAS Assertion to
59 Last CAS Assertion to
60 RAS Assertion to
61 Column Address Valid
62 CAS, RAS, RD, or WR
63 CAS or RD Deassertation
64 Random Read or Write
Width
(Page Mode Access
Only)
RAS Assertion
(Row Address Setup
Time)
Address Not Valid
(Row Address Hold
Time)
to CAS Assertion
(Column Address Setup
Time)
Column Address Not
Valid
(Column Address Hold
Time)
Column Address Not
Valid (Column Address
Hold Time)
Column Address Not
Valid
to RAS Deassertation
Deassertation to WR or
RD Assertion
to Data Not Valid
(Data Hold Time)
Cycle Time (Single
Access Only)
Characteristics
Table 2-8 External Memory Interface (EMI) DRAM Timing (Continued)
t
Symbol
OFF
t
t
t
t
Freescale Semiconductor, Inc.
t
t
t
t
RCH
RAH
CAH
CAH
t
t
RRH
t
ASR
ASC
RAL
CP
AR
RC
, t
For More Information On This Product,
GZ
,
Timing
DSP56004/D, Rev. 3
Mode
slow
slow
slow
slow
slow
slow
slow
fast
fast
fast
fast
fast
fast
fast
Go to: www.freescale.com
3
2
3
2
3
2
7
7
5
Expression
5
3
12
T
T
8
T
T
T
T
T
T
T
T
T
T
T
C
C
C
T
T
L
C
C
L
C
C
C
C
C
C
14
14
14
14
14
14
14
14
0
+ T
+ T
C
C
– 6
– 6
– 5
+ T
+ T
+ T
+ T
+ T
+ T
+ T
+ T
T
T
– 11
– 11
C
C
L
L
H
H
H
H
H
H
H
H
– 7
– 7
–
–
–
–
–
–
–
–
Min Max Min Max Min Max
136
136
240
160
50 MHz
15
56
36
56
36
76
96
63
43
89
49
4
4
0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
100
100
182
121
66 MHz
10
39
24
39
24
54
69
46
30
65
35
2
2
0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
29.2
16.9
29.2
16.9
78.6
41.6
78.6
53.9
36.2
23.9
50.7
26.0
98.8
148
7.3
0.2
0.2
81 MHz
MOTOROLA
0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns