Truth Table/Functionality
The alt3pram
function represents asynchronous memory or memory
with synchronous inputs and/or outputs.
Synchronous Write to Memory (All Inputs Registered) |
|||
---|---|---|---|
|
|
|
Function |
X |
L |
L |
No change. |
not |
H |
H |
No change. |
L |
X |
No change. |
|
H |
H |
The memory location pointed to by
|
Synchronous Read from Memory |
|||
---|---|---|---|
|
|
|
Function |
X |
L |
L |
No change. |
not |
H |
H |
No change. |
L |
X |
No change. |
|
H |
H |
The |
Totally asynchronous memory operations occur when neither
inclock
nor outclock
is connected.
Asynchronous Memory Operations |
|
---|---|
L |
No change. |
H |
The memory location pointed to by
|