spakdsp301vl100 Freescale Semiconductor, Inc, spakdsp301vl100 Datasheet - Page 48

• Manufacturer Part Number: spakdsp301vl100
• Description: Dsp56301 24-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

Specifications
2-22
Notes:
No.
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
RAS assertion to row address not valid
Column address valid to CAS assertion
CAS assertion to column address not valid
RAS assertion to column address not valid
Column address valid to RAS deassertion
WR deassertion to CAS assertion
CAS deassertion to WR
RAS deassertion to WR
CAS assertion to WR deassertion
RAS assertion to WR deassertion
WR assertion pulse width
WR assertion to RAS deassertion
WR assertion to CAS deassertion
Data valid to CAS assertion (write)
CAS assertion to data not valid (write)
RAS assertion to data not valid (write)
WR assertion to CAS assertion
CAS assertion to RAS assertion (refresh)
RAS deassertion to CAS assertion (refresh)
RD assertion to RAS deassertion
RD assertion to data valid
RD deassertion to data not valid
WR assertion to data active
WR deassertion to data high impedance
1.
2.
3.
4.
Table 2-12.
The number of wait states for an out-of-page access is specified in the DCR.
The refresh period is specified in the DCR.
RD deassertion always occurs after CAS deassertion; therefore, the restricted timing is t
Either t
RCH
or t
RRH
4
4
Characteristics
DRAM Out-of-Page and Refresh Timings, Eight Wait States
assertion
assertion
must be satisfied for read cycles.
3
DSP56301 Technical Data, Rev. 10
3
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
WCH
WCR
RCH
RRH
t
RWL
CWL
DHR
WCS
ROH
RAH
ASC
CAH
t
RCS
t
t
CSR
RPC
t
t
RAL
WP
DH
GA
AR
DS
GZ
1.75 × T
0.75 × T
3.25 × T
5.75 × T
1.25 × T
0.25 × T
8.75 × T
7.75 × T
4.75 × T
3.25 × T
5.75 × T
1.75 × T
0.75 × T
5.5 × T
8.5 × T
5.5 × T
1.5 × T
8.5 × T
7.5 × T
Expression
4 × T
2 × T
3 × T
0.25 × T
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
− 4.0
− 3.8
− 4.2
OFF
− 4.2
− 4.5
− 4.3
− 4.0
− 4.0
− 6.5
− 4.0
− 4.0
− 4.0
− 4.0
− 3.7
− 2.6
− 4.3
− 4.3
− 4.0
− 4.0
− 4.0
− 4.0
− 1.5
C
1, 2
and not t
(Continued)
Freescale Semiconductor
GZ
101.8
105.1
102.3
Min
17.9
36.6
67.9
46.0
21.2
11.9
33.3
64.6
92.6
55.4
36.6
67.9
64.5
14.8
17.9
5.4
0.5
0.0
7.9
—
—
.
80 MHz
Max
87.3
3.1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns