spakdsp301vl100 Freescale Semiconductor, Inc, spakdsp301vl100 Datasheet - Page 39

• Manufacturer Part Number: spakdsp301vl100
• Description: Dsp56301 24-bit Digital Signal Processor
• Manufacturer: Freescale Semiconductor, Inc

2.5.5.1 SRAM Timing
Freescale Semiconductor
No.
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
Address and AA valid to
Address and AA valid to
Address valid and AA
assertion pulse width
WR assertion
WR assertion pulse width
WR deassertion to
address not valid
input data valid
RD assertion to input data
valid
RD deassertion to data not
valid (data hold time)
Address valid to WR
deassertion
Data valid to WR
deassertion (data setup
time)
Data hold time from WR
deassertion
WR assertion to data
active
WR deassertion to data
high impedance
Previous RD deassertion
to data active (write)
RD deassertion time
WR deassertion time
Characteristics
2
2
Symbol
t
t
t
DS
Table 2-8.
RC
AA
t
t
t
t
t
t
OHZ
t
WP
WR
AW
OE
DH
, t
AS
, t
(t
DW
WC
AC
)
DSP56301 Technical Data, Rev. 10
(WS + 1) × T
(WS + 2) × T
(WS + 0.75) × T
(WS + 0.25) × T
(WS + 0.75) × T
(WS − 0.25) × T
(WS − 0.5) × T
(WS + 3) × T
SRAM Read and Write Accesses
0.25 × T
1.25 × T
0.75 × T
0.25 × T
1.25 × T
0.25 × T
1.25 × T
0.25 × T
1.25 × T
2.25 × T
0.75 × T
1.75 × T
WS × T
2.5 × T
−0.25 × T
0.25 × T
0.75 × T
2.25 × T
1.25 × T
2.25 × T
2.25 × T
3.25 × T
2.75 × T
1.5 × T
0.5 × T
3.5 × T
T
C
Expression
− 4.0 [2 ≤ WS ≤ 3]
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
C
− 4.0 [4 ≤ WS ≤ 7]
C
− 4.0 [2 ≤ WS ≤ 3]
+ 0.2 [1 ≤ WS ≤ 3]
+ 0.2 [4 ≤ WS ≤ 7]
C
− 2.0 [2 ≤ WS ≤ 3]
C
− 2.0 [1 ≤ WS ≤ 3]
− 4.0 [4 ≤ WS ≤ 7]
C
− 2.0 [1 ≤ WS ≤ 3]
− 2.0 [4 ≤ WS ≤ 7]
C
C
− 3.7 [2 ≤ WS ≤ 3]
C
− 4.0 [1 ≤ WS ≤ 3]
− 4.0 [4 ≤ WS ≤ 7]
C
− 4.0 [1 ≤ WS ≤ 3]
− 4.0 [4 ≤ WS ≤ 7]
C
C
C
C
− 4.0 [WS = 1]
− 4.0 [WS = 1]
− 4.0 [WS ≥ 8]
− 2.0 [WS = 1]
− 2.0 [WS ≥ 4]
− 4.0 [WS ≥ 8]
− 2.0 [WS ≥ 8]
− 3.7 [WS = 1]
+ 0.2 [WS ≥ 8]
− 4.0 [WS ≥ 8]
− 4.0 [WS ≥ 8]
− 4.0 [1 ≤ WS ≤ 3]
− 4.0 [4 ≤ WS ≤ 7]
C
− 3.7 [WS ≥ 4]
C
C
C
C
C
− 4.0 [WS ≥ 8]
− 4.0 [WS ≥ 4]
− 5.0 [WS ≥ 1]
− 5.0 [WS ≥ 1]
− 4.0 [WS ≥ 1]
− 3.0 [WS ≥ 1]
1
133.5
Min
21.0
71.0
13.6
14.8
21.0
39.8
11.6
24.1
17.9
13.6
26.1
–0.6
–6.8
11.6
24.1
36.6
17.9
30.4
27.3
39.8
1.1
7.4
1.1
0.0
6.4
1.1
5.7
5.4
2.3
8.5
—
—
—
—
—
80 MHz
3,6
Max
16.9
10.6
15.8
28.3
3.3
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
AC Electrical Characteristics
106.0
Min
16.0
56.0
10.5
11.0
16.0
31.0
18.5
13.5
10.5
20.5
–1.2
–6.2
18.5
28.5
13.5
23.5
21.0
31.0
0.5
5.5
0.5
8.5
0.0
4.5
0.5
3.8
8.5
3.5
1.0
6.0
—
—
—
—
—
100 MHz
Max
12.5
12.7
22.7
7.5
2.7
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2-13