I/O Structures in IGLOOe and ProASIC3E Devices

4v1.4

I/O Banks and I/O Standards Compatibility

I/Os are grouped into I/O voltage banks.

Each I/O voltage bank has dedicated I/O supply and ground voltages (VMV/GNDQ for input buffers

standards can be assigned to the same I/O voltage bank. Table 3 on page 5 shows the required

voltage compatibility values for each of these voltages.

There are eight I/O banks (two per side).

by the I/O name. For details, see the user I/O naming conventions for "IGLOOe and ProASIC3E" on

page 33. Table 5 on page 5 shows the I/O standards supported by IGLOOe and ProASIC3E devices,

and the corresponding voltage levels.

I/O standards are compatible if they comply with the following:

•

•

•

All inputs and disabled outputs are voltage tolerant up to 3.3 V.

For more information about I/O and global assignments to I/O banks in a device, refer to the

specific pin table for the device in the packaging section of the datasheet, and see the user I/O

naming conventions for "IGLOOe and ProASIC3E" on page 33.

Any I/O in a V

REF

minibank can be used to

provide the reference

voltage to the common

V

minibank.

Common V

REF

signal for all I/Os

in V

Up to five V

REF

minibanks within

an I/O bankF

V

between 8 and 18 I/Os.

I/O Pad

V

CCI

V

CC

GND

I/O

I/O

I/O

I/O

I/O

I/O

I/O

I/O

V

CCI

V

CC

GND

JTAG

CCC/PLL

“C”

CCC/PLL

“B”

CCC/PLL

“D”