LSI53C040-160QFP LSI, LSI53C040-160QFP Datasheet - Page 173

• Manufacturer Part Number: LSI53C040-160QFP
• Manufacturer: LSI

Specifications of LSI53C040-160QFP

• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Supplier Unconfirmed

9.5 Microcontroller Interface Timings
9.5.1 External Memory Interface
Figure 9.10 External Memory Interface Waveforms
AD[7:0]
Table 9.15
A[15:8]
PSEN/
A[7:0]
Symbol
ALE
T
T
T
T
T
T
1
2
3
4
5
6
ADDR
ADDR
Parameter
ALE pulse width = duration of positive ALE pulse
PSEN/ pulse width = duration of negative PSEN/ pulse
PSEN/ falling to instruction valid = maximum delay from
PSEN/ falling to input data valid
Data hold to PSEN/ rising = minimum hold time for data
after PSEN/ rises
ALE falling to instruction valid = maximum delay from ALE
falling to input data valid
Address valid to ALE falling = minimum setup time for
A[15:8] and AD[7:0] to ALE falling
t
6
External Memory Interface Timings
t
ADDR
1
This section provides timing information for the microcontroller interface.
The AC characteristics described in this section apply over the entire
range of operating conditions for the LSI53C040.
Microcontroller Interface Timings
t
5
t
3
ADDR
INSTR
t
2
ADDR
ADDR
t
4
INSTR
Min
23
75
20
–
0
–
Max
55
80
–
–
–
–
Units
ns
ns
ns
ns
ns
ns
9-13