AX2000 datasheet(34/262 Pages) MICROSEMI

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Detailed Specifications

2- 20

R e v i sio n 1 8

User I/O Naming Conventions

Due to the complex and flexible nature of the Axcelerator family’s user I/Os, a naming scheme is used to

show the details of the I/O. The naming scheme explains to which bank an I/O belongs, as well as the

pairing and pin polarity for differential I/Os (Figure 2-7).

Figure 2-7 •

I/O Bank and Dedicated Pin Layout

Figure 2-8 •

General Naming Schemes

Corner4

Corner3

Corner1

I/O BANK 0

I/O BANK 5

I/O BANK 1

I/O BANK 4

Corner2

AX125

GND

VCCDA

GND

VCCDA

GND

VCCDA

GND

VCCDA

GND

VCCDA

GND

VCCA

GND

VCCA

GND

VCCA

GND

VCCA

GND

VCCI2

GND

VCCDA

GND

VCCI6

GND

VCCI7

GND

VCCI3

IOxxXBxFx

Fx refers to an

unimplemented feature

and can be ignored.

Bank I/D 0 through 7,

clockwise from IOB NW

P - Positive Pin/ N - Negative Pin

Pair number in the

bank, starting at 00,

clockwise from IOB NW

IO12PB1F1 is the positive pin of the thirteenth pair of the

first I/O bank (IOB NE). IO12PB1 combined

with IO12NB1 form a differential pair.

For those I/Os that can be employed

either as a user I/O or as a special

function, the following nomenclature

is used:

IOxxXBxFx/special_function_name

IOxxPB1Fx/xCLKx this pin can be configured as a clock

input or as a user I/O.

Examples:

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