Altera MAX 10 Embedded Memory Bedienungsanleitung PDF herunterladen (Seite 9)

Address Clock Enable Support

• The address clock enable feature holds the previous address value for as long as the address clock

enable signal (addressstall) is enabled (addressstall = 1).

• When you configure M9K memory blocks in dual-port mode, each port has its own independent

address clock enable.

• Use the address clock enable feature to improve the effectiveness of cache memory applications during

a cache-miss.

• The default value for the addressstall signal is low.

• The address register output feeds back to its input using a multiplexer. The addressstall signal

selects the multiplexer output.

Figure 2-3: Address Clock Enable Block Diagram

address[0]

address[N]

addressstall

clock

address[0]

address[N]

address[0]

Address Clock Enable During Read Cycle Waveform

Figure 2-4: Address Clock Enable Waveform During Read Cycle

inclock

rden

rdaddress

q (synch)

a1 a2 a3 a4 a5

q (asynch)

latched address

(inside memory)

dout0

dout1

dout4

dout1

dout4

dout5

addressstall

doutn-1

dout1

doutn

dout1

dout0

dout1

UG-M10MEMORY

2015.05.04

Address Clock Enable Support

2-5

MAX 10 Embedded Memory Architecture and Features

Altera Corporation

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