CL-PD6722 datasheet(42/128 Pages) CIRRUS

42 / 128 page

PRELIMINARY DATA SHEET v3.1

CL-PD6710/’22

ISA–to–PC-Card Host Adapters

May 1997

CHIP CONTROL REGISTERS

6.4

Interrupt and General Control

Bits 3:0 — Card IRQ Select

These bits determine which IRQ will occur when the card causes an interrupt through the

RDY/-IREQ pin on the PC Card connector.

Bit 4 — Enable Manage Int

This bit determines how management interrupts will occur.

Bit 5 — Card Is I/O

This bit determines how dual-function socket interface pins will be used.

Index: 03h

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Ring Indicate

Enable

Card Reset*

Card Is I/O

Enable

Manage Int

Card IRQ Select

RW:0

RW:0000

0000

IRQ disabled

0001

Reserved

0010

Reserved

0011

IRQ 3

0100

IRQ 4

0101

IRQ 5

0110

Reserved

0111

IRQ 7

1000

Reserved

1001

IRQ 9 (On the CL-PD6722, this output may alternately be used as an ISA bus DACK* signal)

1010

IRQ 10 (On the CL-PD6722, this output may alternately be used as an ISA bus DRQ signal)

1011

IRQ 11

1100

IRQ 12 (This output may alternately be used for LED)

1101

Reserved

1110

IRQ 14

1111

IRQ 15 (This output may alternately be used for ring indicate)

Card status management interrupts occur as programmed by Management IRQ Select bits (bits 7:4 of

Management Interrupt Conﬁguration register, see page 46).

Card status management interrupts are redirected to the -INTR line instead of the programmed IRQ

pin.

Memory Card Interface mode: card socket conﬁgured to support memory cards. Dual-function socket

interface pins perform memory card-type interface functions.

I/O Card Interface mode: card socket conﬁgured to support I/O/memory card-type interface functions.

Dual-function socket interface pins perform I/O/memory card-type interface functions.

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