Altera Avalon Tri-State Conduit Components Bedienungsanleitung PDF herunterladen (Seite 8)

2–2 Chapter 2: Generic Tri-State Controller

Parameters

Avalon Tri-State Conduit Components User Guide May 2011 Altera Corporation

Preliminary

Parameters

The Generic Tri-State Controller provides preset configurations for many commonly

used external devices. If you select one of the preset configurations, all of the

parameters are automatically assigned the correct values. Many preset configurations

are available, including presets for all of the following devices:

■ Legacy AMD 29LV065D Flash

■ AMD 29LV128M Flash with Legacy SDK support

■ Intel 128P30 Flash

■ Intel 256P30 Flash

■ SST39VF20090 Flash

■ Flash Memory Interface (CFI)

■ ISSI IS61LPS25636A-200TQL1 SSRAM

■ Cypress CY7C1380C SSRAM

■ IDT71V416 SRAM

■ LAN91C111 Interface

■ C8900 Interface (Ethernet)

You can use the parameter editor to specify the required settings for other external

devices. The appropriate values for these parameters are typically listed in the

vendor’s data sheet for the device.

Table 2–1 describes the parameters available on the Signal Selection tab of the

parameter editor for the Generic Tri-State Controller.

Table 2–1. Signal Selection Parameters

Parameter Value Description

Address Width

1–30

Specifies the width of the

address

signal.

Data Width

8,16,32,64,128,

256,512,1024

Specifies the width of the

data

signal.

Byteenable Width

1,2,4,8,16,

32,64,128

Specifies the width of the

byteenable

signal.

Bytes per word

1-128

Specifies the number of bytes per word.

readdata On/Off

Enables or disables the

readdata

signal which is driven from the external device

to the Generic Tri-State Controller in response to a read transfer.

writedata On/Off

Enables or disables the

writedata

signal which is driven from the Generic

Tri-state Controller to the external device during writes transfers.

read On/Off Enables or disables the

read

signal. If present

readdata

is required.

write On/Off Enables or disables the

write

signal. If present

writedata

is required.

begintransfer On/Off

Enables or disables the

begintransfer

signal, which is asserted during the

first cycle of any transfer regardless of the value of the

waitrequest

signal.

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 17 18

Kommentare zu diesen Handbüchern

Keine Kommentare

Altera Avalon Tri-State Conduit Components Bedienungsanleitung Seite 8

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Messgeräte Altera Avalon Tri-State Conduit Components