spakdsp301vl100 Freescale Semiconductor, Inc, spakdsp301vl100 Datasheet - Page 50

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

Specifications
2-24
Notes:
157
No.
No.
187
188
189
190
191
192
193
194
195
158
159
160
161
162
163
164
165
166
167
168
169
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
Random read or write cycle time
RAS assertion to data valid (read)
CAS assertion to data valid (read)
Column address valid to data valid (read)
CAS deassertion to data not valid (read hold time)
RAS deassertion to RAS assertion
RAS assertion pulse width
CAS assertion to RAS deassertion
RAS assertion to CAS deassertion
CAS assertion pulse width
RAS assertion to CAS assertion
RAS assertion to column address valid
CAS deassertion to RAS assertion
1.
2.
3.
4.
Table 2-13.
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
Table 2-14.
RCH
Characteristics
Characteristics
or t
RRH
DRAM Out-of-Page and Refresh Timings, Eleven Wait States
must be satisfied for read cycles.
3
DRAM Out-of-Page and Refresh Timings, Fifteen Wait States
3
3
DSP56301 Technical Data, Rev. 10
Symbol
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
WCS
DHR
ROH
t
t
RCD
CSR
RPC
t
RAC
CAC
t
OFF
t
RAS
RSH
CSH
CAS
RAD
CRP
GA
GZ
RC
RP
AA
0.75 × T
7.75 × T
2.75 × T
11.5 × T
8.25 × T
8.25 × T
4.75 × T
4.75 × T
6.25 × T
9.75 × T
6.25 × T
8.25 × T
4.75 × T
2.75 × T
7.75 × T
Expression
6.5 × T
1.5 × T
Expression
5.5 × T
5.5 × T
10 × T
10 × T
3.5 × T
100 MHz:
0.25 × T
100 MHz:
100 MHz:
100 MHz:
80 MHz:
80 MHz:
80 MHz:
80 MHz:
16 × T
0.0
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
− 6.5
− 7.0
− 4.3
− 4.0
− 6.5
− 5.7
− 4.0
− 4.0
− 4.0
– 1.5
C
− 6.5
− 5.7
− 6.5
− 5.7
− 4.0
− 4.0
− 4.0
− 4.0
− 4.0
± 2.0
− 4.0
± 2
C
139.8
200.0
117.9
Min
92.9
77.0
14.8
30.4
Min
74.1
74.1
99.1
55.4
41.8
32.4
92.9
OFF
0.0
9.1
0.0
—
—
—
—
—
—
—
—
—
80 MHz
80 MHz
and not t
1, 2
118.5
Max
Max
96.6
52.9
62.3
45.8
36.4
3.1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
(Continued)
Freescale Semiconductor
1, 2
GZ
.
111.0
160.0
Min
73.5
60.7
11.0
23.5
Min
58.5
93.5
58.5
78.5
43.5
33.0
25.5
73.5
0.0
6.0
0.0
—
—
—
—
—
—
—
—
—
100 MHz
100 MHz
Max
Max
93.0
76.8
41.8
49.3
37.0
29.5
2.5
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
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
ns
ns