Texas Instruments PCI7411, PCI7611, PCI7621 manual 9. Multifunction and Miscellaneous Terminals, 18

Table 2−9. Multifunction and Miscellaneous Terminals

The power rail designation is not applicable for the multifunction and miscellaneous terminals.

TERMINAL

DESCRIPTION

I/O

INPUT

OUTPUT

PU/

EXTERNAL

PIN STRAPPING

NAME

NO.

TYPE

PD

COMPONENTS

(IF UNUSED)

E02

USB enable. These output terminals control an

A_USB_EN

external CBT switch for each socket when an USB

O

LVCO1

CBT switch

Float

B_USB_EN

E01

card is inserted into the socket.

CLK_48

M01

A 48-MHz clock must be connected to this terminal.

I

LVCI1

48 MHz clock

source

MFUNC0

N03

I/O

PCII3

PCIO3

10-kΩto 47-kΩ

pullup resistor

MFUNC1

M05

I/O

PCII3

PCIO3

10-kΩto 47-kΩ

pullup resistor

MFUNC2

P01

I/O

PCII3

PCIO3

10-kΩto 47-kΩ

pullup resistor

Multifunction terminals 0−6. See Section 4.36,

MFUNC3

P02

I/O

PCII3

PCIO3

10-kΩto 47-kΩ

Multifunction Routing Status Register, for

pullup resistor

configuration details.

MFUNC4

P03

I/O

PCII3

PCIO3

10-kΩto 47-kΩ

pullup resistor

MFUNC5

N05

I/O

PCII3

PCIO3

10-kΩto 47-kΩ

pullup resistor

MFUNC6

R01

I/O

PCII3

PCIO3

10-kΩto 47-kΩ

pullup resistor

NC

W17

Reserved. This terminal has no connection

Float

anywhere within the package.

PHY_TEST_

R17

PHY test pin. Not for customer use. It must be pulled

I

LVCI1

PD1

NA

MA

high with a 4.7-kΩresistor.

Ring indicate out and power management event

RI_OUT/

Pullup resistor per

T03

output. This terminal provides an output for

O

LVCO2

NA

PME

PCI specification

ring-indicate or PME signals.

RSVD

T19

Reserved. This terminal has no connection

—

Float

anywhere within the package.

Serial clock. At

the SCL signal is sampled to

PRST,

determine if a two-wire serial ROM is present. If the

serial ROM is detected, then this terminal provides

Pullup resistor per

the serial clock signaling and is implemented as

I2C specification

Tie to GND if not

SCL

M03

open-drain. For normal operation (a ROM is

I/O

TTLI1

TTLO1

(value depends on

using EEPROM

implemented in the design), this terminal must be

EEPROM,

pulled high to the ROM VDD with a 2.7-kΩresistor.

typically 2.7 kΩ)

Otherwise, it must be pulled low to ground with a

220-Ωresistor.

Serial data. This terminal is implemented as

Pullup resistor per

open-drain, and for normal operation (a ROM is

I2C specification

implemented in the design), this terminal must be

Tie to GND if not

SDA

M02

I/O

TTLI1

TTLO1

(value depends on

pulled high to the ROM VDD with a 2.7-kΩresistor.

using EEPROM

EEPROM,

Otherwise, it must be pulled low to ground with a

typically 2.7 kΩ)

220-Ωresistor.

Speaker output. SPKROUT is the output to the host

system that can carry SPKR or CAUDIO through the

10-kΩto 47-kΩ

10-kΩto 47-kΩ

SPKROUT

L07

controller from the PC Card interface. SPKROUT is

O

TTLO1

pulldown resistor

pulldown resistor

driven as the exclusive-OR combination of card

SPKR//CAUDIO inputs.

Suspend.

protects the internal registers

SUSPEND

from clearing when the GRST or

PRST

signal is

10-kΩto 47-kΩ

10-kΩto 47-kΩ

SUSPEND

R02

I

PCII6

asserted. See Section 3.8.6, Suspend Mode, for

pullup resistor

pullup resistor

details.

Terminal TEST0 is used for factory test of the

TEST0

P12

controller and must be connected to ground for

I/O

LVCI1

PD1

Tie to GND

normal operation.

2−18