dsp56367 Freescale Semiconductor, Inc, dsp56367 Datasheet - Page 40

• Manufacturer Part Number: dsp56367
• Description: Dsp56367 24-bit Audio Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

External Memory Expansion Port (Port A)
3-16
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
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 assertion
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, 01— not applicable
• BRW[1:0] = 10
• BRW[1:0] = 11
Table 3-9 DRAM Page Mode Timings, Three Wait States
Characteristics
DSP56367 Technical Data, Rev. 2.1
5
Symbol
t
t
t
t
t
RHCP
t
t
t
t
t
t
t
t
t
t
t
WCH
t
WCS
RSH
CRP
CAH
RCS
RCH
RWL
CWL
t
ROH
t
CAC
t
OFF
CAS
t
ASC
RAL
t
WP
DH
PC
AA
CP
DS
4.75 × T
6.75 × T
1.25 × T
2.25 × T
3.75 × T
3.25 × T
1.25 × T
0.75 × T
2.5 × T
4.5 × T
1.5 × T
2.5 × T
3.5 × T
0.5 × T
2.5 × T
3.5 × T
Expression
2 × T
2 × T
4 × T
3 × T
1.25 × T
T
2 × T
C
− 4.0
C
C
C
C
1, 2, 3
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
− 7.0
− 4.0
− 4.0
− 7.0
C
− 4.0
− 4.0
− 4.0
− 4.0
− 4.5
− 4.0
− 4.0
− 4.0
− 6.0
− 6.0
− 4.0
− 4.2
− 4.3
− 4.3
− 4.3
− 4.0
C
4
Freescale Semiconductor
20.0
12.5
21.0
41.0
16.0
41.5
61.5
11.0
21.0
36.0
18.3
30.5
33.2
28.2
21.0
31.0
Min
0.0
6.0
8.5
3.5
1.0
8.2
—
—
100 MHz
Max
13.0
23.0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns