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Specifications
External Memory Expansion Port (Port A)
MOTOROLA
DSP56367
3-39
183
WR assertion to RAS deassertion
t
RWL
11.75
×
T
C
−
4.3
113.2
—
ns
184
WR assertion to CAS deassertion
t
CWL
10.25
×
T
C
−
4.3
103.2
—
ns
185
Data valid to CAS assertion (write)
t
DS
5.75
×
T
C
−
4.0
53.5
—
ns
186
CAS assertion to data not valid (write)
t
DH
5.25
×
T
C
−
4.0
48.5
—
ns
187
RAS assertion to data not valid (write)
t
DHR
7.75
×
T
C
−
4.0
73.5
—
ns
188
WR assertion to CAS assertion
t
WCS
6.5
×
T
C
−
4.3
60.7
—
ns
189
CAS assertion to RAS assertion (refresh)
t
CSR
1.5
×
T
C
−
4.0
11.0
—
ns
190
RAS deassertion to CAS assertion (refresh)
t
RPC
2.75
×
T
C
−
4.0
23.5
—
ns
191
RD assertion to RAS deassertion
t
ROH
11.5
×
T
C
−
4.0
111.0
—
ns
192
RD assertion to data valid
t
GA
10
×
T
C
−
7.0
—
93.0
ns
193
RD deassertion to data not valid
4
t
GZ
0.0
—
ns
194
WR assertion to data active
0.75
×
T
C
−
0.3
7.2
—
ns
195
WR deassertion to data high impedance
0.25
×
T
C
—
2.5
ns
Note:
1.
The number of wait states for out-of-page access is specified in the DCR.
2.
The refresh period is specified in the DCR.
3.
The asynchronous delays specified in the expressions are valid for DSP56367.
4.
RD deassertion will always occur after CAS deassertion; therefore, the restricted timing is t
OFF
and not t
GZ
.
5.
Either t
RCH
or t
RRH
must be satisfied for read cycles.
Table 3-16 DRAM Out-of-Page and Refresh Timings, Fifteen Wait States
No.
Characteristics
3
Symbol
Expression
Min
Max
Uni
t
157
Random read or write cycle time
t
RC
16
×
T
C
133.3
—
ns
158
RAS assertion to data valid (read)
t
RAC
8.25
×
T
C
−
5.7
—
63.0
ns
159
CAS assertion to data valid (read)
t
CAC
4.75
×
T
C
−
5.7
—
33.9
ns
160
Column address valid to data valid (read)
t
AA
5.5
×
T
C
−
5.7
—
40.1
ns
Table 3-15 DRAM Out-of-Page and Refresh Timings, Eleven Wait States
No.
Characteristics
4
Symbol
Expression
3
Min
Max
Unit
Содержание DSP56367
Страница 16: ...xvi MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Страница 22: ...xxii MOTOROLA List of Figures Figure Number Title Page Number ...
Страница 26: ...xxvi MOTOROLA List of Tables Table Number Title Page Number ...
Страница 148: ...4 6 DSP56367 MOTOROLA Design Considerations PLL Performance Issues ...
Страница 248: ...9 30 DSP56367 MOTOROLA Serial Host Interface SHI Programming Considerations ...
Страница 306: ...10 58 DSP56367 MOTOROLA Enhanced Serial Audio Interface ESAI ESAI Initialization Examples ...
Страница 389: ...Bootstrap ROM Contents MOTOROLA DSP56367 A 15 end ...
Страница 390: ...A 16 DSP56367 MOTOROLA Bootstrap ROM Contents ...
Страница 432: ...C 8 DSP56367 MOTOROLA JTAG BSDL ...
Страница 484: ...D 52 DSP56367 MOTOROLA Programmer s Reference ...
Страница 490: ...E 6 DSP56367 MOTOROLA Power Consumption Benchmark ...
Страница 516: ...F 26 DSP56367 MOTOROLA IBIS Model ...
Страница 522: ...Index 6 MOTOROLA Index ...
Страница 523: ......