Dual Data Rate Register

Features

Family Support

Axcelerator, ProASIC3/E, Fusion

Description

SmartGen can generate Dual Data Rate Registers parameterized for a specific Data Width and with a choice of the type of Input Buffers.

In ProASIC3/E, the DDR Registers may also be combined with output buffers or bi-directional buffers.

The Bidirectional enable signal polarity (TriEN) is selectable.

Parameter Description

Parameter

Value

Function

WIDTH

1-128

Data Width

Axcelerator DDR Register

Port Description - Input Buffer plus DDR Register for Axcelerator

Port Name

Size

Type

Req/Opt

Function

PAD

WIDTH

Input

Req.

Input Data

QR

WIDTH

Output

Req.

Output Data

QF

WIDTH

Output

Req.

Ouput Data

E

1

Input

Req.

Enable

CLK

1

Input

Req.

Clock

CLR

1

Input

Req.

Clear

PRE

1

Input

Req.

Preset

ProASIC3/E DDR Registers

Port Description - Input Buffer plus DDR Register for ProASIC3/E

Port Name

Size

Type

Req/Opt

Function

PAD

WIDTH

Input

Req.

Input Data

QR

WIDTH

Output

Req.

Output Data

QF

WIDTH

Output

Req.

Ouput Data

CLK

1

Input

Req.

Clock

CLR

1

Input

Req.

Clear

Port Description - Bidirectional Buffer plus DDR Register for ProASIC3/E

Port Name

Size

Type

Req/Opt

Function

PAD

WIDTH

Input/Output

Req.

Input/Output Data

DataR

WIDTH

Input

Req.

Input Data

DataF

WIDTH

Input

Req.

Input Data

QR

WIDTH

Output

Req.

Output Data

QF

WIDTH

Output

Req.

Output Data

TriEN

1

Input

Req.

Bibuf-Enable

CLK

1

Input

Req.

Clock

CLR

1

Input

Req.

Clear

Port Description - DDR Register plus Output Buffer for ProASIC3/E

Port Name

Size

Type

Req/Opt

Function

PAD

WIDTH

Output

Req.

Output Data

DataR

WIDTH

Input

Req.

Input Data

DataF

WIDTH

Input

Req.

Input Data

CLK

1

Input

Req.

Clock

CLR

1

Input

Req.

Clear

Port Description - Tri-State Buffer plus DDR Register for ProASIC3/E

Port Name

Size

Type

Req/Opt

Function

PAD

WIDTH

Input/Output

Req.

Output Data

DataR

WIDTH

Input

Req.

Input Data

DataF

WIDTH

Input

Req.

Input Data

TriEN

1

Input

Req.

Tribuf Enable

CLK

1

Input

Req.

Clock

CLR

1

Input

Req.

Clear