參數(shù)資料
型號(hào): XCB56364PV100
廠商: MOTOROLA INC
元件分類: 數(shù)字信號(hào)處理
英文描述: 24-Bit Audio Digital Signal Processor
中文描述: 8-BIT, 100 MHz, OTHER DSP, PQFP112
封裝: QFP-112
文件頁數(shù): 41/162頁
文件大?。?/td> 2405K
代理商: XCB56364PV100
Specifications
External Memory Expansion Port (Port A)
MOTOROLA
DSP56364 Advance Information
2-21
2.10.2
DRAM Timing
The selection guides provided in
Figure 2-11
and
Figure 2-14
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 sys
tem
performance.
Figure 2-11 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
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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