Motorola DSP56367 User Manual page 102

Specifications
External Memory Expansion Port (Port A)
Table 3-14 DRAM Out-of-Page and Refresh Timings, Eight Wait States
No.
Characteristics
161 CAS deassertion to data not valid
(read hold time)
162 RAS deassertion to RAS assertion
163 RAS assertion pulse width
164 CAS assertion to RAS deassertion
165 RAS assertion to CAS deassertion
166 CAS assertion pulse width
167 RAS assertion to CAS assertion
168 RAS assertion to column address
valid
169 CAS deassertion to RAS assertion
170 CAS deassertion pulse width
171 Row address valid to RAS
assertion
172 RAS assertion to row address not
valid
173 Column address valid to CAS
assertion
174 CAS assertion to column address
not valid
175 RAS assertion to column address
not valid
176 Column address valid to RAS
deassertion
177 WR deassertion to CAS assertion
178
CAS deassertion to WR
179
RAS deassertion to WR
180 CAS assertion to WR deassertion
181 RAS assertion to WR deassertion
3-36
4
Symbol
Expression
t
OFF
3.25 × T
t
RP
5.75 × T
t
RAS
3.25 × T
t
RSH
4.75 × T
t
CSH
2.25 × T
t
CAS
2.5 × T
t
RCD
1.75 × T
t
RAD
4.25 × T
t
CRP
2.75 × T
t
CP
3.25 × T
t
ASR
1.75 × T
t
RAH
0.75 × T
t
ASC
3.25 × T
t
CAH
5.75 × T
t
AR
4 × T
t
RAL
2 × T
t
RCS
1.25 × T
5 t
assertion
RCH
0.25 × T
5 t
assertion
RRH
0.25 × T
3 × T
t
WCH
5.5 × T
t
WCR
DSP56367
66 MHz
3
Min Max
0.0 —
− 4.0
45.2 —
C
− 4.0
83.1 —
C
− 4.0
45.2 —
C
− 4.0
68.0 —
C
− 4.0
30.1 —
C
± 2
35.9 39.9
C
± 2
24.5 28.5
C
− 4.0
59.8 —
C
− 4.0
37.7 —
C
− 4.0
45.2 —
C
− 4.0
22.5 —
C
− 4.0
7.4 —
C
− 4.0
45.2 —
C
− 4.0
83.1 —
C
− 4.0
56.6 —
C
− 3.8
26.5 —
C
− 3.7
15.2 —
C
− 3.7
0.1 —
C
− 3.0
— —
C
− 4.2
41.3 —
C
− 4.2
79.1 —
C
80 MHz
Unit
Min Max
0.0 — ns
36.6 — ns
67.9 — ns
36.6 — ns
55.5 — ns
24.1 — ns
29.3 33.3 ns
19.9 23.9 ns
49.1 — ns
30.4 — ns
36.6 — ns
17.9 — ns
5.4 — ns
36.6 — ns
67.9 — ns
46.0 — ns
21.2 — ns
11.9 — ns
— — ns
0.1 — ns
33.3 — ns
64.6 — ns
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