3-22
DSP56367
MOTOROLA
Specifications
External Memory Expansion Port (Port A)
3.10.2
DRAM TIMING
The selection guides provided in Figure 3-11 and Figure 3-14 should be used for primary
selection only. Final selection should be based on the timing provided in the following tables.
As an example, the selection guide suggests that 4 wait states must be used for 100 MHz
operation when using Page Mode DRAM. However, by using the information in the
appropriate table, a designer may choose to evaluate whether fewer wait states might be used
by determining which timing prevents operation at 100 MHz, running the chip at a slightly
lower frequency (e.g., 95 MHz), using faster DRAM (if it becomes available), and control
factors such as capacitive and resistive load to improve overall system performance.
Figure 3-11 DRAM Page Mode Wait States Selection Guide
Chip Frequency
(MHz)
DRAM Type
(t
RAC
ns)
100
80
70
60
40
66
80
100
1 Wait States
2 Wait States
3 Wait States
4 Wait States
Note:
This figure should be use for primary selection.
For exact and detailed timings see the
following tables.
AA047
50
120
Summary of Contents for DSP56367
Page 16: ...xvi MOTOROLA CONTENTS Paragraph Number Title Page Number ...
Page 22: ...xxii MOTOROLA List of Figures Figure Number Title Page Number ...
Page 26: ...xxvi MOTOROLA List of Tables Table Number Title Page Number ...
Page 148: ...4 6 DSP56367 MOTOROLA Design Considerations PLL Performance Issues ...
Page 248: ...9 30 DSP56367 MOTOROLA Serial Host Interface SHI Programming Considerations ...
Page 306: ...10 58 DSP56367 MOTOROLA Enhanced Serial Audio Interface ESAI ESAI Initialization Examples ...
Page 389: ...Bootstrap ROM Contents MOTOROLA DSP56367 A 15 end ...
Page 390: ...A 16 DSP56367 MOTOROLA Bootstrap ROM Contents ...
Page 432: ...C 8 DSP56367 MOTOROLA JTAG BSDL ...
Page 484: ...D 52 DSP56367 MOTOROLA Programmer s Reference ...
Page 490: ...E 6 DSP56367 MOTOROLA Power Consumption Benchmark ...
Page 516: ...F 26 DSP56367 MOTOROLA IBIS Model ...
Page 522: ...Index 6 MOTOROLA Index ...
Page 523: ......