dsp56362 Freescale Semiconductor, Inc, dsp56362 Datasheet - Page 47
dsp56362
Manufacturer Part Number
dsp56362
Description
Dsp56362 24-bit Audio Digital Signal Processor
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.DSP56362.pdf
(152 pages)
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No.
Page mode cycle time for two consecutive accesses of the
same direction
Page mode cycle time for mixed (read and write) accesses.
CAS assertion to data valid (read)
Column address valid to data valid (read)
CAS deassertion to data not valid (read hold time)
Last CAS assertion to RAS deassertion
Previous CAS deassertion to RAS deassertion
CAS assertion pulse width
Last CAS deassertion to RAS deassertion
CAS deassertion pulse width
Column address valid to CAS assertion
CAS assertion to column address not valid
Last column address valid to RAS deassertion
WR deassertion to CAS assertion
CAS deassertion to WR assertion
CAS assertion to WR deassertion
WR assertion pulse width
Last WR assertion to RAS deassertion
WR assertion to CAS deassertion
Data valid to CAS assertion (write)
CAS assertion to data not valid (write)
WR assertion to CAS assertion
Last RD assertion to RAS deassertion
• BRW[1:0] = 00
• BRW[1:0] = 01
• BRW[1:0] = 10
• BRW[1:0] = 11
5
Table 3-10 DRAM Page Mode Timings, Two Wait States
Characteristics
DSP56362 Technical Data, Rev. 4
6
5
Symbol
t
t
t
t
RHCP
t
t
t
t
t
t
t
t
t
t
t
t
WCH
t
WCS
RCH
RWL
CWL
t
ROH
t
CAC
t
OFF
RSH
CAS
CRP
t
ASC
CAH
RCS
t
RAL
WP
PC
AA
CP
DS
DH
External Memory Expansion Port (Port A)
1.75 × T
3.25 × T
1.25 × T
1.75 × T
1.25 × T
2.75 × T
0.25 × T
1.75 × T
1.5 × T
2.5 × T
1.5 × T
2.0 × T
3.5 × T
4.5 × T
6.5 × T
0.5 × T
1.5 × T
2.5 × T
2.5 × T
2.5 × T
Expression
3 × T
2.75 x Tc
T
T
3 × T
C
C
− 4.0
C
− 4.3
1, 2, 3, 4
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
− 4.0
C
− 6.5
− 6.5
− 4.0
− 6.0
− 6.0
− 6.0
− 6.0
− 3.7
− 4.2
− 4.5
− 4.3
− 4.0
− 4.0
− 4.0
− 4.0
− 4.0
− 3.8
− 4.3
− 3.0
− 4.0
37.5
34.4
17.9
36.6
14.8
19.0
37.8
50.3
75.3
11.6
17.9
33.5
11.8
14.6
26.8
30.1
27.0
17.9
27.3
Min
0.0
8.5
2.6
0.1
8.2
—
—
80 MHz
Max
12.3
24.8
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3-21
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