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DSP56300FM View Datasheet(PDF) - Freescale Semiconductor

Part Name
Description
MFG CO.
DSP56300FM
Freescale
Freescale Semiconductor Freescale
'DSP56300FM' PDF : 148 Pages View PDF
External Memory Expansion Port (Port A)
Table 3-9 DRAM Page Mode Timings, One Wait State (Low-Power Applications)1, 2, 3 (continued)
20 MHz4
30 MHz4
No.
Characteristics
Symbol
Expression
Unit
Min Max Min Max
134 CAS deassertion to data not valid
tOFF
(read hold time)
0.0
0.0
ns
135 Last CAS assertion to RAS
deassertion
tRSH
0.75 × TC 4.0 33.5
21.0
ns
136 Previous CAS deassertion to RAS
deassertion
tRHCP
2 × TC 4.0
96.0 — 62.7 —
ns
137 CAS assertion pulse width
138 Last CAS deassertion to RAS
deassertion5
BRW[1:0] = 00
tCAS
0.75 × TC 4.0 33.5
21.0
ns
tCRP
1.75 × TC 6.0 81.5
52.3
ns
• BRW[1:0] = 01
• BRW[1:0] = 10
• BRW[1:0] = 11
139 CAS deassertion pulse width
140 Column address valid to CAS
assertion
3.25 × TC 6.0 156.5
102.2 —
ns
4.25 × TC 6.0 206.5
135.5 —
ns
6.25 × TC – 6.0 306.5 — 202.1 —
ns
tCP
0.5 × TC 4.0
21.0
12.7
ns
tASC
0.5 × TC 4.0
21.0
12.7
ns
141 CAS assertion to column address not
tCAH
0.75 × TC 4.0 33.5
21.0
ns
valid
142 Last column address valid to RAS
deassertion
tRAL
2 × TC 4.0
96.0 — 62.7 —
ns
143 WR deassertion to CAS assertion
tRCS
0.75 × TC 3.8 33.7
21.2
ns
144 CAS deassertion to WR assertion
tRCH
0.25 × TC 3.7
8.8
4.6
ns
145 CAS assertion to WR deassertion
tWCH
0.5 × TC 4.2
20.8
12.5
ns
146 WR assertion pulse width
tWP
1.5 × TC 4.5
70.5
45.5
ns
147 Last WR assertion to RAS deassertion tRWL
1.75 × TC 4.3 83.2
54.0
ns
148 WR assertion to CAS deassertion
tCWL
1.75 × TC 4.3 83.2
54.0
ns
149 Data valid to CAS assertion (Write)
tDS
0.25 × TC 4.0
8.5
4.3
ns
150 CAS assertion to data not valid (write)
tDH
0.75 × TC 4.0 33.5
21.0
ns
151 WR assertion to CAS assertion
tWCS
TC 4.3
45.7 — 29.0 —
ns
3-18
DSP56364 Technical Data, Rev. 4.1
Freescale Semiconductor
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