Motorola DSP56367 User Manual page 104

Specifications
External Memory Expansion Port (Port A)
Table 3-15 DRAM Out-of-Page and Refresh Timings, Eleven Wait States
No.
157 Random read or write cycle time
158 RAS assertion to data valid (read)
159 CAS assertion to data valid (read)
160 Column address valid to data valid (read)
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
182 WR assertion pulse width
3-38
4
Characteristics
5
assertion
5
assertion
DSP56367
3
Symbol
Expression
12 × T
t
RC C
6.25 × T − 7.0
t
RAC C
3.75 × T − 7.0
t
CAC C
4.5 × T − 7.0
t
AA C
t
OFF
4.25 × T − 4.0
t
RP C
7.75 × T − 4.0
t
RAS C
5.25 × T − 4.0
t
RSH C
6.25 × T − 4.0
t
CSH C
3.75 × T − 4.0
t
CAS C
2.5 × T ± 4.0
t
RCD C
1.75 × T ± 4.0
t
RAD C
5.75 × T − 4.0
t
CRP C
4.25 × T − 4.0
t
CP C
4.25 × T − 4.0
t
ASR C
1.75 × T − 4.0
t
RAH C
0.75 × T − 4.0
t
ASC C
5.25 × T − 4.0
t
CAH C
7.75 × T − 4.0
t
AR C
6 × T − 4.0
t
RAL C
3.0 × T − 4.0
t
RCS C
1.75 × T − 4.0
t
RCH C
0.25 × T − 2.0
t
RRH C
5 × T − 4.2
t
WCH C
7.5 × T − 4.2
t
WCR C
11.5 × T − 4.5
t
WP C
Min Max Unit
120.0 — ns
— 55.5 ns
— 30.5 ns
— 38.0 ns
0.0 — ns
38.5 — ns
73.5 — ns
48.5 — ns
58.5 — ns
33.5 — ns
21.0 29.0 ns
13.5 21.5 ns
53.5 — ns
38.5 — ns
38.5 — ns
13.5 — ns
3.5 — ns
48.5 — ns
73.5 — ns
56.0 — ns
26.0 — ns
13.5 — ns
0.5 — ns
45.8 — ns
70.8 — ns
110.5 — ns
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