MEC1322 datasheet(5/456 Pages) MICROCHIP

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DS00001719D-page 5

MEC1322

1.0

PIN CONFIGURATION

1.1

Description

The Pin Configuration chapter includes a Pin List, Pin Description, Pin Multiplexing and Package Outline.

1.2

Terminology and Symbols for Pins/Buffers

Note 1-1

See the “PCI Local Bus Specification,” Revision 2.1, Section 4.2.2.

Note 1-2

See the “PCI Local Bus Specification,” Revision 2.1, Section 4.2.2 and 4.2.3.

1.3

Pin List

The Pin List for the three package options is shown in Table 1-1, Table 1-2 and Table 1-3.

Term

Definition

Pin Ref. Number

There is a unique reference number for each pin name.

The ‘#’ sign at the end of a signal name indicates an active-low signal

The lowercase ‘n’ preceding a signal name indicates an active-low signal

PWR

Power

Digital Input

Input with Schmitt Trigger

I_AN

Analog Input

Push-Pull Output

Open Drain Output

Bi-directional pin

IOD

Bi-directional pin with Open Drain Output

PIO

Programmable as Input, Output, Open Drain Output, Bi-directional or Bi-directional with Open

Drain Output.

PCI_I

Input. These pins meet the PCI 3.3V AC and DC Characteristics. (Note 1-1)

PCI_O

Output. These pins meet the PCI 3.3V AC and DC Characteristics. (Note 1-1)

PCI_OD

Open Drain Output. These pins meet the PCI 3.3V AC and DC Characteristics. (Note 1-1)

PCI_IO

Input/Output These pins meet the PCI 3.3V AC and DC Characteristics. (Note 1-1)

PCI_ICLK

Clock Input. These pins meet the PCI 3.3V AC and DC Characteristics and timing. (Note 1-2)

PCI_PIO

Programmable as Input, Output, Open Drain Output, Bi-directional or Bi-directional with Open

Drain Output. These pins meet the PCI 3.3V AC and DC Characteristics. (Note 1-1).

IO_PECI

PECI Input/Output. These pins are at the PECI VREF level. See Chapter 37.0, "Electrical Spec-

ifications".

Note:

The Pin Ref. Numbers are the same as the pin numbers in the “128 VTQFP Number” column in Table 1-1,

"MEC1322 128 VTQFP Pin Configuration".

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