Texas Instruments PCI7621, PCI7411, PCI7611, PCI7421 manual Card Control Register, Card control

4.38 Card Control Register

The card control register is provided for PCI1130 compatibility. RI_OUT is enabled through this register, and the enable bit is shared between functions 0 and 1. See Table 4−16 for a complete description of the register contents.

The RI_OUT signal is enabled through this register, and the enable bit is shared between functions 0 and 1.

Bit

7

6

5

4

3

2

1

0

Name

Card control

Type

RW

RW

RW

R

R

RW

RW

RW

Default

0

0

0

0

0

0

0

0

Register:

Card control

Offset:

91h

Type:

Read-only, Read/Write

Default:

00h

Table 4−16. Card Control Register Description

BIT

SIGNAL

TYPE

FUNCTION

7 ‡§

RIENB

RW

Ring indicate enable. When this bit is 1, the

RI_OUT

output is enabled. This bit defaults to 0.

6−3

RSVD

RW

These bits are reserved. Do not change the value of these bits.

CardBus audio-to-MFUNC. When this bit is set, the CAUDIO CardBus signal must be routed through an

2 ‡

AUD2MUX

RW

MFUNC terminal. If this bit is set for both functions, then function 0 is routed.

0

= CAUDIO set to CAUDPWM on MFUNC terminal (default)

1

= CAUDIO is not routed.

When bit 1 is set, the

SPKR

terminal from the PC Card is enabled and is routed to tthe SPKROUT terminal.

The SPKR signal from socket 0 is XORed with the SPKR signal from socket 1 and sent to SPKROUT. The

1 ‡

SPKROUTEN

RW

SPKROUT terminal drives data only when the SPKROUTEN bit of either function is set. This bit is encoded

as:

0

=

SPKR

to SPKROUT not enabled (default)

1

= SPKR to SPKROUT enabled

Interrupt flag. This bit is the interrupt flag for 16-bit I/O PC Cards and for CardBus cards. This bit is set when

a functional interrupt is signaled from a PC Card interface, and is socket dependent (i.e., not global). Write

0 ‡

IFG

RW

back a 1 to clear this bit.

0

= No PC Card functional interrupt detected (default)

1

= PC Card functional interrupt detected

‡This bit is cleared only by the assertion of GRST.

§This bit is global in nature and must be accessed only through function 0.

4−28