Altera Avalon Verification IP Suite Uživatelský manuál stáhnout pdf (Strana 52)

Chapter 3: Avalon-MM Slave BFM 3–9

Parameters

May 2011 Altera Corporation Avalon Verification IP Suite User Guide

Assert byteenable high On On/Off When On,

byteenable

is asserted high.

Assert readdatavalid high On On/Off When On,

readdatavalid

is asserted high.

Assert arbiterlock high On On/Off When On,

arbiterlock

is asserted high.

Assert lock high On On/Off When On,

lock

is asserted high.

Burst Attributes

Linewrap burst On On/Off

When On, the address for bursts wraps instead of an

incrementing. With a wrapping burst, when the address

reaches a burst boundary, it wraps back to the previous burst

boundary such that only the low order bits need to be used

for addressing.

Burst on burst boundaries only On On/Off When On, memory bursts are aligned to the address size.

Miscellaneous

Maximum pending reads 1 —

The maximum number of pending reads which can be queued

up by the slave.

Timing

Fixed read latency (cycles) 0 —

Sets the read latency for fixed-latency slaves. Not used on

interfaces that include the

readdatavalid

signal.

Fixed read wait time (cycles) 1 —

For slave interfaces that do not use the

waitrequest

signal,

the read wait time indicates the number of cycles before the

slave responds to a read. The timing is as if the slave asserted

waitrequest

for this number of cycles.

Fixed write wait time (cycles) 0 —

For slave interfaces that do not use the

waitrequest

signal,

the write wait time indicates the number of cycles before the

slave accepts a write.

Registered waitrequest On On/Off Specifies whether to turn on the register stage.

Registered Incoming Signals On On/Off Specifies whether to register incoming signals.

Interface Address Type

Set slave interface address type to

symbols or words

WORDS

WORDS/

SYMBOLS

Sets slave interface address type to symbols or words.

API Streaming Interface (Note 1)

Width of API interface data signal 64 — The width of the data signal.

Width of API return interface data

signal

64 — The width of the return interface data signal.

Note to Table 3–3:

(1) This interface is required only for the Avalon-MM Slave BFM with Avalon-ST API Wrapper that is used in mixed language simulations.

Table 3–3. Parameters for the Avalon-MM Slave BFM (Part 2 of 2)

Parameter

Default

Value

Legal

Values

Description

1 2 ... 47 48 49 50 51 52 53 54 55 56 57 ... 177 178

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