Characteristics Symbol; Timing Mode; 50 Mhz 66 Mhz 88 Mhz Unit Min Max Min Max Min Max; Width (Page Mode Access Only) - Motorola NXP SYMPHONY DSP56007 Technical Data Manual

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