AX99100QF datasheet(10/70 Pages) ASIX

10 / 70 page

AX99100

PCIe to Multi I/O Controller

Table 1-2: PCIe Pin Description

PCIe interface

Pin Name

Type

Pin No

Pin Description

CLKN

PCIe PHY differential PLL reference clock.

CLKP

PCIe PHY differential PLL reference clock.

REXT

Bandgap External Resistor

Connect this pin to ground through an external resistor of 20KΩ, ±1%. The total

parasitic capacitor of this pin to ground must be less than 10 pF

DIN

PCIe PHY differential negative serial data input.

DIP

PCIe PHY differential positive serial data input.

DOP

PCIe PHY differential positive serial data output.

DON

PCIe PHY differential negative serial data output.

WAKEn

O5/T/4m

An open-drain, active low signal that is driven low by a PCI Express function to

reactivate the PCI Express Link hierarchy’s main power rails and reference

clocks.

CLKREQn

O5/T/4m

Reference clock request signal

This pin is an open drain, active low signal that is driven low by the PCI Express

Mini Card function to request that the PCI Express reference clock be available

(active clock state) in order to allow the PCI Express interface to send/receive

data.

RSTn

I5/PU/S/

Active low asynchronous reset from PCIe.

Indicates when the applied main power is within the specified tolerance and

stable.

Table 1-3: Power/Ground Pin Description

Power/Ground Pins

Pin Name

Type

Pin No

Pin Description

VCCIO

6, 26, 39,

Digital Power for I/O pins, 3.3V

Please add a 0.1uF bypass capacitor between each VCCIO and GND.

VCCK

10, 22,

37, 57

Digital Power for core, 1.2V

Please add a 0.1uF bypass capacitor between each VCCK and GND.

GND

EPAD

Ground for all Analog and Digital Power.

VCC33A_REG

Analog Power for Regulator, 3.3V

VO12

1.2V Power Output of on-chip 3.3V to 1.2V Regulator.

The regulator requires an external capacitor (at least 3.3 μF) with low ESR for

frequency compensation and stability maintenance.

VCC12A_TX

Analog Power for PCIe Transmitter, 1.2V.

Please add a 0.1 and 10 uF bypass capacitor between VCC12A_TX and GND.

VCC12A_D

Analog Power for PCIe Transceiver, 1.2V.

Please add a 0.1 and 10 uF bypass capacitor between VCC12A_D and GND.

VCC12A_AUX

Analog Power for PCIe Auxiliary, 1.2V.

Please add a 0.1 and 10 uF bypass capacitor between VCC12A_AUX and

GND.

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