dsp56362 Freescale Semiconductor, Inc, dsp56362 Datasheet - Page 59

• Manufacturer Part Number: dsp56362
• Description: Dsp56362 24-bit Audio Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
1
2
3
4
5
No.
157
158
159
160
182
183
184
185
186
187
188
189
190
191
192
193
194
195
No.
The number of wait states for out-of-page access is specified in the DCR.
The refresh period is specified in the DCR.
RD deassertion will always occur after CAS deassertion; therefore, the restricted timing is t
The asynchronous delays specified in the expressions are valid for DSP56362.
Either t
Table 3-16 DRAM Out-of-Page and Refresh Timings, Fifteen Wait States 100 and 120MHz
Random read or write cycle time
RAS assertion to data valid (read)
CAS assertion to data valid (read)
Column address valid to data valid (read)
WR assertion pulse width
WR assertion to RAS deassertion
WR assertion to CAS deassertion
Data valid to CAS assertion (write)
CAS assertion to data not valid (write)
RAS assertion to data not valid (write)
WR assertion to CAS assertion
CAS assertion to RAS assertion (refresh)
RAS deassertion to CAS assertion (refresh)
RD assertion to RAS deassertion
RD assertion to data valid
RD deassertion to data not valid
WR assertion to data active
WR deassertion to data high impedance
Table 3-15 DRAM Out-of-Page and Refresh Timings, Eleven Wait States
RCH
or t
RRH
Characteristics
must be satisfied for read cycles.
Characteristics
3
3
DSP56362 Technical Data, Rev. 4
3
Symbol
t
t
t
RAC
CAC
t
RC
AA
8.25 × T
4.75 × T
5.5 × T
Expression
16 × T
Symbol
t
t
t
t
t
t
t
t
RWL
CWL
WCS
ROH
t
t
DHR
CSR
RPC
t
t
WP
DS
DH
GA
GZ
C
C
C
− 5.7
C
− 5.7
− 5.7
11.75 × T
10.25 × T
External Memory Expansion Port (Port A)
11.5 × T
5.75 × T
5.25 × T
7.75 × T
2.75 × T
11.5 × T
0.75 × T
6.5 × T
1.5 × T
Expression
10 × T
160.0
0.25 × T
Min
—
—
—
100 MHz
C
C
C
C
C
C
C
C
C
C
C
C
− 7.0
− 4.3
− 4.0
− 4.5
− 4.0
− 4.0
− 4.0
− 4.0
− 4.0
− 0.3
− 4.3
− 4.3
C
Max
76.8
41.8
49.3
OFF
—
4
1, 2
and not t
110.5
113.2
103.2
111.0
(continued)
53.5
48.5
73.5
60.7
11.0
23.5
Min
133.3
0.0
7.2
—
Min
100 MHz
—
—
120 MHz
GZ
.
Max
93.0
2.5
Max
—
—
—
—
—
—
—
—
—
—
—
—
63.0
33.9
40.1
—
1, 2
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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