DSPB56364AF100 Datasheet, PDF (48/148 Pages) Freescale Semiconductor, Inc – 24-Bit Audio Digital Signal Processor

External Memory Expansion Port (Port A)
Table 3-15 DRAM Out-of-Page and Refresh Timings, Eleven Wait States^{1, 2} (continued)
No.
Characteristics³
Symbol
Expression⁴
Min Max Unit
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 WR⁵ assertion
179 RAS deassertion to WR⁵ assertion
180 CAS assertion to WR deassertion
181 RAS assertion to WR deassertion
182 WR assertion pulse width
183 WR assertion to RAS deassertion
184 WR assertion to CAS deassertion
185 Data valid to CAS assertion (write)
186 CAS assertion to data not valid (write)
187 RAS assertion to data not valid (write)
188 WR assertion to CAS assertion
189 CAS assertion to RAS assertion (refresh)
190 RAS deassertion to CAS assertion (refresh)
t_RSH
5.25 × T_C − 4.0 48.5
—
ns
t_CSH
6.25 × T_C − 4.0 58.5
—
ns
t_CAS
3.75 × T_C − 4.0 33.5
—
ns
t_RCD
2.5 × T_C ± 4.0
21.0 29.0
ns
t_RAD
1.75 × T_C ± 4.0 13.5 21.5
ns
t_CRP
5.75 × T_C − 4.0 53.5
—
ns
t_CP
4.25 × T_C − 4.0 38.5
—
ns
t_ASR
4.25 × T_C − 4.0 38.5
—
ns
t_RAH
1.75 × T_C − 4.0 13.5
—
ns
t_ASC
0.75 × T_C − 4.0
3.5
—
ns
t_CAH
5.25 × T_C − 4.0 48.5
—
ns
t_AR
7.75 × T_C − 4.0 73.5
—
ns
t_RAL
6 × T_C − 4.0
56.0 —
ns
t_RCS
3.0 × T_C − 4.0
26.0
—
ns
t_RCH
1.75 × T_C − 4.0 13.5
—
ns
t_RRH
0.25 × T_C − 2.0
0.5
—
ns
t_WCH
5 × T_C − 4.2
45.8 —
ns
t_WCR
7.5 × T_C − 4.2
70.8
—
ns
t_WP
11.5 × T_C − 4.5 110.5 —
ns
t_RWL
11.75 × T_C − 4.3 113.2 —
ns
t_CWL
10.25 × T_C − 4.3 103.2 —
ns
t_DS
5.75 × T_C − 4.0 53.5
—
ns
t_DH
5.25 × T_C − 4.0 48.5
—
ns
t_DHR
7.75 × T_C − 4.0 73.5
—
ns
t_WCS
6.5 × T_C − 4.3
60.7
—
ns
t_CSR
1.5 × T_C − 4.0
11.0
—
ns
t_RPC
2.75 × T_C − 4.0 23.5
—
ns
3-32
DSP56364 Technical Data, Rev. 4.1
Freescale Semiconductor