DSP56364D Motorola Inc, DSP56364D Datasheet - Page 47

• Manufacturer Part Number: DSP56364D
• Description: 24-Bit Audio Digital Signal Processor
• Manufacturer: Motorola Inc

Notes:
MOTOROLA
No.
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
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
RD assertion to data valid
RD deassertion to data not valid
WR assertion to data active
WR deassertion to data high impedance
1.
2.
3.
4.
5.
6.
Table 2-11 DRAM Page Mode Timings, Three Wait States
The number of wait states for Page mode access is specified in the DCR.
The refresh period is specified in the DCR.
The asynchronous delays specified in the expressions are valid for DSP56364
All the timings are calculated for the worst case. Some of the timings are better for specific cases (e.g.,
t
BRW[1:0] (DRAM control register bits) defines the number of wait states that should be inserted in each
DRAM out-of page-access.
RD deassertion will always occur after CAS deassertion; therefore, the restricted timing is t
t
PC
GZ
.
equals 4
Characteristics
T
C
Freescale Semiconductor, Inc.
for read-after-read or write-after-write sequences).
For More Information On This Product,
DSP56364 Advance Information
Go to: www.freescale.com
6
Symbol
External Memory Expansion Port (Port A)
t
t
t
t
t
t
t
t
t
WCH
t
WCS
RCH
RWL
CWL
t
ROH
t
CAH
RCS
t
t
RAL
WP
DS
DH
GA
GZ
1.25
2.25
3.75
3.25
1.25
0.75
0.75
2.5
3.5
0.5
2.5
3.5
2.5
Expression
4
0.25
T
T
T
T
T
T
T
C
T
T
T
T
T
T
T
C
C
C
C
C
C
C
C
C
C
C
C
1, 2, 3
C
T
4.0
C
4.0
4.5
4.0
4.0
4.0
7.0
4.0
4.2
4.3
4.3
4.3
0.3
(continued)
21.0
36.0
18.3
30.5
33.2
28.2
21.0
31.0
Min
8.5
3.5
1.0
8.2
0.0
7.2
—
—
Specifications
OFF
Max
18.0
2.5
—
—
—
—
—
—
—
—
—
—
—
—
—
—
and not
2-27
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns