PCI6621 datasheet(64/204 Pages) TI

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3−16

Table 3−9. Interrupt Mask and Flag Registers

CARD TYPE

EVENT

MASK

FLAG

16-bit memory

Battery conditions (BVD1, BVD2)

ExCA offset 05h/45h/805h bits 1 and 0

ExCA offset 04h/44h/804h bits 1 and 0

16-bit memory

Wait states (READY)

ExCA offset 05h/45h/805h bit 2

ExCA offset 04h/44h/804h bit 2

16-bit I/O

Change in card status (STSCHG)

ExCA offset 05h/45h/805h bit 0

ExCA offset 04h/44h/804h bit 0

16-bit I/O/

UltraMedia

Interrupt request (IREQ)

Always enabled

PCI configuration offset 91h bit 0

All 16-bit PC

Cards/

Smart Card

adapters/

UltraMedia/

Flash Media

Power cycle complete

ExCA offset 05h/45h/805h bit 3

ExCA offset 04h/44h/804h bit 3

Change in card status (CSTSCHG)

Socket mask bit 0

Socket event bit 0

CardBus

Interrupt request (CINT)

Always enabled

PCI configuration offset 91h bit 0

CardBus

Power cycle complete

Socket mask bit 3

Socket event bit 3

Card insertion or removal

Socket mask bits 2 and 1

Socket event bits 2 and 1

Functional interrupt events are valid only for 16-bit I/O and CardBus cards; that is, the functional interrupts are not

valid for 16-bit memory cards. Furthermore, card insertion and removal-type CSC interrupts are independent of the

card type.

Table 3−10. PC Card Interrupt Events and Description

CARD TYPE

EVENT

TYPE

SIGNAL

DESCRIPTION

Battery conditions

CSC

BVD1(STSCHG)//CSTSCHG

A transition on BVD1 indicates a change in the

PC Card battery conditions.

16-bit

memory

Battery conditions

(BVD1, BVD2)

CSC

BVD2(SPKR)//CAUDIO

A transition on BVD2 indicates a change in the

PC Card battery conditions.

memory

Wait states

(READY)

CSC

READY(IREQ)//CINT

A transition on READY indicates a change in the

ability of the memory PC Card to accept or provide

data.

16-bit I/O

Change in card

status (STSCHG)

CSC

BVD1(STSCHG)//CSTSCHG

The assertion of STSCHG indicates a status change

on the PC Card.

16-bit I/O/

UltraMedia

Interrupt request

(IREQ)

Functional

READY(IREQ)//CINT

The assertion of IREQ indicates an interrupt request

from the PC Card.

CardBus

Change in card

status (CSTSCHG)

CSC

BVD1(STSCHG)//CSTSCHG

The assertion of CSTSCHG indicates a status

change on the PC Card.

CardBus

Interrupt request

(CINT)

Functional

READY(IREQ)//CINT

The assertion of CINT indicates an interrupt request

from the PC Card.

All PC Cards/

Smart Card

adapters/

Card insertion

or removal

CSC

CD1//CCD1,

CD2//CCD2

A transition on either CD1//CCD1 or CD2//CCD2

indicates an insertion or removal of a 16-bit or

CardBus PC Card.

adapters/

UltraMedia/

Flash Media

Power cycle

complete

CSC

N/A

An interrupt is generated when a PC Card power-up

cycle has completed.

The naming convention for PC Card signals describes the function for 16-bit memory, I/O cards, and CardBus. For

example, READY(IREQ)//CINT includes READY for 16-bit memory cards, IREQ for 16-bit I/O cards, and CINT for

CardBus cards. The 16-bit memory card signal name is first, with the I/O card signal name second, enclosed in

parentheses. The CardBus signal name follows after a double slash (//).

The 1997 PC Card Standard describes the power-up sequence that must be followed by the PCI6x21/PCI6x11

controller when an insertion event occurs and the host requests that the socket VCC and VPP be powered. Upon

completion of this power-up sequence, the PCI6x21/PCI6x11 interrupt scheme can be used to notify the host system

(see Table 3−10), denoted by the power cycle complete event. This interrupt source is considered a

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