参数资料
型号: SPAKD56366PV120
厂商: MOTOROLA INC
元件分类: 数字信号处理
英文描述: 24-BIT, 120 MHz, OTHER DSP, PQFP144
封装: TQFP-144
文件页数: 110/147页
文件大小: 2156K
代理商: SPAKD56366PV120
Specifications
External Memory Expansion Port (Port A)
MOTOROLA
DSP56366 Advance Information
2-35
179 RAS deassertion to WR5 assertion
tRRH
0.25
× TC 2.0
0.1
ns
180 CAS assertion to WR deassertion
tWCH
6
× TC 4.2
45.8
ns
181 RAS assertion to WR deassertion
tWCR
9.5
× TC 4.2
75.0
ns
182 WR assertion pulse width
tWP
15.5
× TC 4.5
124.7
ns
183 WR assertion to RAS deassertion
tRWL
15.75
× TC 4.3
126.9
ns
184 WR assertion to CAS deassertion
tCWL
14.25
× TC 4.3
114.4
ns
185 Data valid to CAS assertion (write)
tDS
8.75
× TC 4.0
68.9
ns
186 CAS assertion to data not valid (write)
tDH
6.25
× TC 4.0
48.1
ns
187 RAS assertion to data not valid (write)
tDHR
9.75
× TC 4.0
77.2
ns
188 WR assertion to CAS assertion
tWCS
9.5
× TC 4.3
74.9
ns
189 CAS assertion to RAS assertion (refresh)
tCSR
1.5
× TC 4.0
8.5
ns
190 RAS deassertion to CAS assertion (refresh)
tRPC
4.75
× TC 4.0
35.6
ns
191 RD assertion to RAS deassertion
tROH
15.5
× TC 4.0
125.2
ns
192 RD assertion to data valid
tGA
14
× TC 5.7
111.0
ns
193 RD deassertion to data not valid3
tGZ
0.0
ns
194 WR assertion to data active
0.75
× TC 0.3
5.9
ns
195 WR deassertion to data high impedance
0.25
× TC
—2.1
ns
Notes:
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 tOFF and not tGZ.
4.
Either tRCH or tRRH must be satisfied for read cycles.
Table 2-16 DRAM Out-of-Page and Refresh Timings, Fifteen Wait States1, 2 (Continued)
No.
Characteristics3
Symbol
Expression
Min
Max
Unit
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