參數(shù)資料
型號: DSP56364P
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): 45/148頁
文件大?。?/td> 1204K
代理商: DSP56364P
External Memory Expansion Port (Port A)
DSP56364 Technical Data, Rev. 4
Freescale Semiconductor
3-29
188
WR assertion to CAS assertion
t
WCS
3
×
T
C
4.3
145.7
95.7
ns
189
CAS assertion to RAS assertion
(refresh)
t
CSR
0.5
×
T
C
4.0
21.0
12.7
ns
190
RAS deassertion to CAS assertion
(refresh)
t
RPC
1.25
×
T
C
4.0
58.5
37.7
ns
191
RD assertion to RAS deassertion
t
ROH
4.5
×
T
C
4.0
221.0
146.0
ns
192
RD assertion to data valid
t
GA
4
×
T
C
7.5
192.5
125.8
ns
193
RD deassertion to data not valid
3
t
GZ
0.0
0.0
ns
194
WR assertion to data active
0.75
×
T
C
0.3
37.2
24.7
ns
195
WR deassertion to data high
impedance
0.25
×
T
C
12.5
8.3
ns
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
RD deassertion will always occur after CAS deassertion; therefore, the restricted timing is t
OFF
and not t
GZ
.
4
Reduced DSP clock speed allows use of DRAM out-of-page access with four Wait states (See
Figure 3-17
).
Table 3-14 DRAM Out-of-Page and Refresh Timings, Eight Wait States
1, 2
No.
Characteristics
3
Symbol
Expression
4
66 MHz
80 MHz
Unit
Min
Max
Min
Max
157
Random read or write cycle time
t
RC
9
×
T
C
136.4
112.5
ns
158
RAS assertion to data valid (read)
t
RAC
4.75
×
T
C
7.5
64.5
ns
4.75
×
T
C
6.5
52.9
ns
159
CAS assertion to data valid (read)
t
CAC
2.25
×
T
C
7.5
26.6
ns
2.25
×
T
C
6.5
21.6
ns
160
Column address valid to data valid
(read)
t
AA
3
×
T
C
7.5
40.0
ns
3
×
T
C
6.5
31.0
ns
161
CAS deassertion to data not valid
(read hold time)
t
OFF
0.0
0.0
ns
162
RAS deassertion to RAS assertion
t
RP
3.25
×
T
C
4.0
45.2
36.6
ns
163
RAS assertion pulse width
t
RAS
5.75
×
T
C
4.0
83.1
67.9
ns
Table 3-13 DRAM Out-of-Page and Refresh Timings, Four Wait States
1, 2
(continued)
No.
Characteristics
3
Symbol
Expression
20 MHz
4
30 MHz
4
Unit
Min
Max
Min
Max
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DSP56366P 24-Bit Audio Digital Signal Processor
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DSP56367P 24-Bit Audio Digital Signal Processor
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DSP56364UM 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DSP56364 24-Bit Digital Signal Processor User's Manual
DSP56366 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DSP56366 24-Bit Audio Digital Signal Processor
DSP56366P 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:24-Bit Audio Digital Signal Processor
DSP56366UM 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:24-Bit Audio Digital Signal Processor
DSP56367 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic