XIO2001IPNP datasheet(14/141 Pages) TI1

14 / 141 page

XIO2001

SCPS212I – MAY 2009 – REVISED JANUARY 2016

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Miscellaneous Pins (continued)

SIGNAL

ZGU

BALL

NO.

ZAJ

BALL

NO.

PNP

NO.

I/O

TYPE

CELL

TYPE

CLAMP

RAIL

EXTERNAL

PARTS

DESCRIPTION

GPIO3 // SDA

N11

L08

I/O

CMOS

VDD_33

Optional pullup

resistor

GPIO3 or serial-bus data. This terminal

functions as serial-bus data if a pullup

resistor is detected on SCL or when the

SBDETECT bit is set in the Serial Bus

Control and Status Register (see Serial-

Bus Control and Status Register). If no

pullup is detected then this terminal

functions as GPIO3.

Note: In serial-bus mode, an external

pullup resistor is required to prevent the

SDA signal from floating.

GPIO4 // SCL

M10

I/O

CMOS

VDD_33

Optional pullup

resistor

GPIO4 or serial-bus clock. This terminal

functions as serial-bus clock if a pullup

resistor is detected on SCL or when the

SBDETECT bit is set in the Serial Bus

Control and Status Register (see Serial-

Bus Control and Status Register). If no

pullup is detected then this terminal

functions as GPIO4.

Note: In serial-bus mode, an external

pullup resistor is required to prevent the

SCL signal from floating.

Note: This terminal has an internal

active pullup resistor. The pullup is only

active when reset is asserted or when

the GPIO is configured as an input.

GRST

N13

M11

CMOS

VDD_33

_COMBIO

–

Global

reset

input.

Asynchronously

resets all logic in device, including sticky

bits

and

power

management

state

machines.

Note: The GRST input buffer has both

hysteresis and an internal active pullup.

The pullup is active at all times.

PCLK66_

SEL

B12

A11

CMOS

VDD_33

Optional

pulldown

resistor

PCI

clock

select.

This

terminal

determines

the

default

PCI

clock

frequency

driven out the CLKOUTx

terminals.

0 = 50 MHz PCI Clock

1 = 66 MHz PCI Clock

Note: This terminal has an internal

active pullup resistor. This pullup is

active at all times.

Note: M66EN terminal also has an

affect of PCI clock frequency.

SERIRQ

N08

M08

I/O

PCI

Bus

PCIR

Pullup or

pulldown

resistor

Serial

IRQ

interface.

This

terminal

functions as a serial IRQ interface if a

pullup is detected when PERST is

deasserted. If a pulldown is detected,

then the serial IRQ interface is disabled.

VREG_

PD33

D12

E11

CMOS

VDD_33

_COMBIO

Pulldown

resistor

3.3-V voltage regulator powerdown. This

terminal should always be tied directly to

ground or an optional pulldown resistor

can be used.

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