Intel® Quartus® Prime Standard Edition User Guide: Platform Designer

ID 683364
Date 12/15/2018
Public
Document Table of Contents

4.1.8.2. Address Span Extender Parameters

Table 92.  Address Span Extender Parameters
Parameter Description

Datapath Width

Width of write data and read data signals.

Expanded Master Byte Address Width

Width of the master byte address port. That is, the address span size of all the downstream slaves that attach to the address span extender.

Slave Word Address Width

Width of the slave word address port. That is, the address span size of the downstream slaves that the upstream master accesses.

Burstcount Width

Burst count port width of the downstream slave and the upstream master that attach to the address span extender.

Number of sub-windows

The slave port can represent one or more windows in the master address span. You can subdivide the slave address span into N equal spans in N sub-windows. A remapping register in the CSR slave represents each sub-window, and configures the base address that each sub-window remaps to. The address span extender replaces the upper bits of the address with the stored index value in the remapping register before the master initiates a transaction.

Enable Slave Control Port

Dictates run-time control over the sub-window indexes. If you can define static re-mappings that do not need any change, you do not need to enable this CSR slave.

Maximum Pending Reads

Sets the bridge slave's maximumPendingReadTransactions property. In certain system configurations, you must increase this value to improve performance. This value usually aligns with the properties of the downstream slaves that you attach to this bridge.