Altera MAX 10 Embedded Memory Bedienungsanleitung PDF herunterladen (Seite 10)

Address Clock Enable During Write Cycle Waveform

Figure 2-5: Address Clock Enable Waveform During Write Cycle

inclock

wren

wraddress

a0 a1 a2 a3 a4 a5

an a0

a4 a5

latched address

(inside memory)

addressstall

data

01 02

03 04

contents at a0

contents at a1

contents at a2

contents at a3

contents at a4

contents at a5

Asynchronous Clear

You can selectively enable asynchronous clear per logical memory using the RAM: 1-PORT and RAM: 2-

PORT IP cores.

The M9k block supports asynchronous clear for:

• Read address registers: Asserting asynchronous clear to the read address register during a read

operation might corrupt the memory content.

• Output registers: When applied to output registers, the asynchronous clear signal clears the output

registers and the effects are immediately seen. If your RAM does not use output registers, you can still

clear the RAM outputs using the output latch asynchronous clear feature.

• Output latches

Note:

Input registers other than read address registers are not supported.

Figure 2-6: Output Latch Asynchronous Clear Waveform

aclr

aclr at latch

clk

a1 a0 a1

2-6

Address Clock Enable During Write Cycle Waveform

UG-M10MEMORY

2015.05.04

Altera Corporation

MAX 10 Embedded Memory Architecture and Features

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