spakdsp301vl100 Freescale Semiconductor, Inc, spakdsp301vl100 Datasheet - Page 47

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

Freescale Semiconductor
No.
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
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
CAS deassertion pulse width
Row address valid to RAS assertion
Table 2-12.
DRAM Type
(t
RAC
100
Figure 2-17.
80
70
50
Characteristics
60
ns)
DRAM Out-of-Page and Refresh Timings, Eight Wait States
4 Wait States
8 Wait States
Note:
40
DRAM Out-of-Page Wait States Selection Guide
DSP56301 Technical Data, Rev. 10
3
66
This figure should be used for primary selection. For
exact and detailed timings, see the following tables.
80
100
11 Wait States
15 Wait States
Symbol
120
t
t
t
t
t
t
t
t
t
t
t
RCD
t
RAC
CAC
t
OFF
t
RAS
RSH
CSH
CAS
RAD
CRP
t
ASR
RC
AA
RP
CP
4.75 × T
2.25 × T
3.25 × T
5.75 × T
3.25 × T
4.75 × T
2.25 × T
4.25 × T
2.75 × T
3.25 × T
Expression
1.75 × T
3 × T
2.5 × T
Chip Frequency
(MHz)
9 × T
C
C
C
C
C
C
C
C
C
C
C
− 6.5
C
C
C
− 6.5
− 6.5
− 4.0
− 4.0
− 4.0
− 4.0
− 4.0
− 4.0
− 6.0
− 4.0
± 2
± 2
AC Electrical Characteristics
1, 2
112.5
Min
36.6
67.9
36.6
55.4
24.1
29.3
19.9
49.1
28.4
36.6
0.0
—
—
—
80 MHz
Max
52.9
21.6
31.0
33.3
23.9
—
—
—
—
—
—
—
—
—
—
Unit
2-21
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns