Altera MAX 10 Embedded Memory Bedienungsanleitung PDF herunterladen (Seite 16)

Read Port

Write Port

8192 × 1 4096 × 2 2048 × 4 1024 × 8 512 × 16 1024 × 9 512 × 18

512 × 16 Yes Yes Yes Yes Yes — —

1024 × 9 — — — — — Yes Yes

512 × 18 — — — — — Yes Yes

Maximum Block Depth Configuration

The Set the maximum block depth parameter allows you to set the maximum block depth of the

dedicated memory block you use. You can slice the memory block to your desired maximum block depth.

For example, the capacity of an M9K block is 9,216 bits, and the default memory depth is 8K, in which

each address is capable of storing 1 bit (8K × 1). If you set the maximum block depth to 512, the M9K

block is sliced to a depth of 512 and each address is capable of storing up to 18 bits (512 × 18).

Use this parameter to save power usage in your devices and to reduce the total number of memory blocks

used. However, this parameter might increase the number of LEs and affects the design performance.

When the RAM is sliced shallower, the dynamic power usage decreases. However, for a RAM block with a

depth of 256, the power used by the extra LEs starts to outweigh the power gain achieved by shallower

slices.

The maximum block depth must be in a power of two, and the valid values vary among different

dedicated memory blocks.

This table lists the valid range of maximum block depth for M9K memory blocks.

Table 2-5: Valid Range of Maximum Block Depth for M9K Memory Blocks

Memory Block Valid Range

M9K 256 - 8K. The maximum block depth must be in a power of two.

The IP parameter editor prompts an error message if you enter an invalid value for the maximum block

depth. Altera recommends that you set the value of the Set the maximum block depth parameter to Auto

if you are unsure of the appropriate maximum block depth to set or the setting is not important for your

design. The Auto setting enables the Compiler to select the maximum block depth with the appropriate

port width configuration for the type of internal memory block of your memory.

2-12

Maximum Block Depth Configuration

UG-M10MEMORY

2015.05.04

Altera Corporation

MAX 10 Embedded Memory Architecture and Features

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Altera MAX 10 Embedded Memory Bedienungsanleitung Seite 16