DSP56300FM View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'DSP56300FM' PDF : 148 Pages View PDF
External Memory Expansion Port (Port A)
A0–A17
AA0–AA3
WR
RD
100
107
101
102
114
119
103
118
TA
D0–D23
108
111
110
112
109
Data
Out
AA0469
Figure 3-10 SRAM Write Access
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.
3-16
DSP56364 Technical Data, Rev. 4.1
Freescale Semiconductor
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