External Memory Expansion Port (Port A) - Motorola DSP56367 User Manual

3.10

EXTERNAL MEMORY EXPANSION PORT (PORT A)

3.10.1 SRAM TIMING
Table 3-8 SRAM Read and Write Accesses
No. Characteristics
100 Address valid and AA assertion pulse width
101 Address and AA valid to WR assertion
102 WR assertion pulse width
103 WR deassertion to address not valid
104 Address and AA valid to input data valid
MOTOROLA
External Memory Expansion Port (Port A)
Symbol
Expression
(WS + 1) × T
t , t
RC WC
[1 ≤ WS ≤ 3]
(WS + 2) × T
[4 ≤ WS ≤ 7]
(WS + 3) × T
[WS ≥ 8]
0.25 × T
t
AS
[WS = 1]
1.25 × T
[WS ≥ 4]
1.5 × T − 4.0 [WS = 1]
t
WP C
All frequencies:
WS × T
[2 ≤ WS ≤ 3]
(WS − 0.5) × T
[WS ≥ 4]
0.25 × T
t
WR
[1 ≤ WS ≤ 3]
1.25 × T
[4 ≤ WS ≤ 7]
2.25 × T
[WS ≥ 8]
All frequencies:
1.75 × T
2.25 × T
[WS ≥ 8]
(WS + 0.75) × T
t , t
AA AC
[WS ≥ 1]
DSP56367
Specifications
1
Min Max
− 4.0
12.0 —
C
− 4.0
46.0 —
C
− 4.0
87.0 —
C
− 2.0
0.1 —
C
− 2.0
8.4 —
C
8.5 —
12.7 —
− 4.0
C
19.0 —
C
− 2.0
0.1 —
C
− 2.0
8.4 —
C
14.7 —
C
12.0 —
C
14.7 —
C
− 7.0
— 7.6
C
Uni
t
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3-17