參數(shù)資料
型號: DSP56367UM
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
元件分類: 數(shù)字信號處理
英文描述: 24-Bit Audio Digital Signal Processor
中文描述: 24位音頻數(shù)字信號處理器
文件頁數(shù): 53/100頁
文件大小: 1039K
代理商: DSP56367UM
External Memory Expansion Port (Port A)
DSP56367 Technical Data, Rev. 2.1
Freescale Semiconductor
3-29
Figure 3-17 DRAM Refresh Access
3.10.3
Arbitration Timings
Table 3-14 Asynchronous Bus Arbitration Timing
1, 2, 3
1
Bit 13 in the OMR register must be set to enter Asynchronous Arbitration mode.
2
If Asynchronous Arbitration mode is active, none of the timings in
Table 3-14
is required.
3
In order to guarantee timings 250, and 251, it is recommended to assert BG inputs to different 56300 devices (on the same
bus) in a non overlap manner as shown in
Figure 3-18
.
No.
Characteristics
Expression
150 MHz
Unit
Min
Max
250
BB assertion window from BG input negation.
2 .5* Tc + 5
21.7
ns
251
Delay from BB assertion to BG assertion
2 * Tc + 5
18.3
ns
RAS
CAS
WR
157
163
162
162
190
170
165
189
177
AA0478
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