Configure I/O bank

Families Supported

The following table shows which families support this constraint and which file formats and tools you can use to enter or modify it:

Families

PDC

ChipPlanner

Fusion

X

X

ProASIC3E

X

X

ProASIC3

X

X

ProASIC PLUS

 

 

Axcelerator

X

X

ProASIC

 

 

eX

 

 

SX-A

 

 

SX

 

 

MX

 

 

3200DX

 

 

ACT3

 

 

ACT2/1200XL

 

 

ACT1

 

 

Purpose

Use this constraint to set the I/O supply voltage (VCCI) for I/O banks.

I/Os are organized into banks. The configuration of these banks determines the I/O standards supported. Since each I/O bank has its own user-assigned input reference voltage (VREF) and an input/output supply voltage, only I/Os with compatible standards can be assigned to the same bank.

For ProASIC3E and Axcelerator devices, you can use the set_iobank PDC command to set the input/output supply voltage and the input reference voltage for an I/O bank. However, for ProASIC3 devices, you can use this command to set only the input/output supply voltage for an I/O bank.

For Axcelerator devices, you can also use the set_iobank command to set the input delay value and enable or disable the low-power mode for input and output buffers.

Tools /How to Enter

You can use one or more of the following commands or GUI tools to configure I/O banks:

See Also

Constraint entry

set_iobank

Manually assigning technologies to I/O banks