dsp56366 Freescale Semiconductor, Inc, dsp56366 Datasheet - Page 55

• Manufacturer Part Number: dsp56366
• Description: Dsp56366 24-bit Audio Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

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2
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Freescale Semiconductor
No.
193 RD deassertion to data not valid
194 WR assertion to data active
195 WR deassertion to data high impedance
The number of wait states for out-of-page access is specified in the DCR.
The refresh period is specified in the DCR.
RD deassertion will always occur after CAS deassertion; therefore, the restricted timing is t
The asynchronous delays specified in the expressions are valid for DSP56366.
Either t
No.
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
RCH
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
RAS assertion to row address not valid
Column address valid to CAS assertion
Table 3-14 DRAM Out-of-Page and Refresh Timings, Eight Wait States
or t
RRH
Table 3-15 DRAM Out-of-Page and Refresh Timings, Eleven Wait States
must be satisfied for read cycles.
Characteristics
Characteristics
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4
DSP56366 Technical Data, Rev. 3.1
3
Symbol
t
GZ
0.75 × T
Expression
Symbol
0.25 × T
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RAC
CAC
t
RSH
CSH
RCD
RAD
CRP
t
RAH
t
OFF
RAS
CAS
ASR
ASC
RC
AA
RP
CP
0.0
C
− 0.3
C
4
6.25 × T
3.75 × T
4.25 × T
7.75 × T
5.25 × T
6.25 × T
3.75 × T
1.75 × T
5.75 × T
4.25 × T
4.25 × T
1.75 × T
0.75 × T
4.5 × T
2.5 × T
Expression
11.1
Min
0.0
—
12 × T
66 MHz
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
OFF
− 7.0
± 4.0
C
− 7.0
− 7.0
− 4.0
− 4.0
− 4.0
− 4.0
− 4.0
± 4.0
− 4.0
− 4.0
− 4.0
− 4.0
− 4.0
Max
3.8
—
—
1, 2
4
and not t
(continued)
120.0
38.5
73.5
48.5
58.5
33.5
21.0
13.5
53.5
38.5
38.5
13.5
Min
Min
0.0
9.1
0.0
3.5
—
1, 2
—
—
—
GZ
80 MHz
.
55.5
30.5
38.0
Max
Max
29.0
21.5
3.1
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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