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CL-PD6833

PCI-to-CardBus Host Adapter

Cirrus Logic 

CL-PD6833

PCI-to-CardBus Host Adapter

Table 2-2. Socket Interface Pins (cont.)

Pin Name1

Description2

Pin Number

Qty. I/O Pwr. Drive

Socket A Socket B

-CE2/

CAD10

Card Enable: This pin is driven low by the

CL-PD6833 during card access cycles to

control byte/word card access. -CE1

enables even-numbered address bytes,

and -CE2 enables odd-numbered address

bytes. When configured for 8-bit cards,

74

only -CE1 is active and A0 is used to indi-

cate access of odd- or even-numbered

bytes.

In CardBus mode, this pin is the CardBus

address/data bit 10.

Card-

150

1

I/O 2 or 3 Bus

spec.

-CE1/

CCBE0#

Card Enable: This pin is driven low by the

CL-PD6833 during card access cycles to

control byte/word card access. -CE1

enables even-numbered address bytes,

and -CE2 enables odd-numbered address

bytes. When configured for 8-bit cards,

70

only -CE1 is active and A0 is used to

indicate access of odd- or even-numbered

bytes.

In CardBus mode, this pin is the command

and byte enable 0.

Card-

147

1

I/O 2 or 3 Bus

spec.

RESET/

CRST#

Card Reset: This output is low for normal

operation and goes high to reset the card.

To prevent reset glitches to a card, this

signal is high-impedance unless a card is

seated in the socket, card power is

106

applied, and the card’s interface signals

are enabled.

In CardBus mode, this pin is the RST#

input to the card, which is active-low.

Card-

182

1 O-TS 2 or 3 Bus

spec.

BVD2/

-SPKR/

-LED/

CAUDIO

Battery Voltage Detect 2 / Speaker /

LED: In Memory Card Interface mode, this

input serves as the BVD2 (battery warning

status) input. In I/O Card Interface mode,

this input can be configured as a card’s -

SPKR binary audio input. For ATA or non-

114

ATA (SFF-68) disk-drive support, this input

can also be configured as a drive-status

LED input.

In CardBus mode, this pin is the AUDIO

input from the card.

190

1 I-PU 2 or 3 –

1 To differentiate the sockets in the pin diagram, all socket-specific pins have either A_ or B_ prepended to the pin names indi-

cated. For example, A_A[25:0] and B_A[25:0] are the independent address buses to the sockets.

2 When a socket is configured as an ATA drive interface, socket interface pin functions change. See Chapter 14.

June 1998

ADVANCE DATA BOOK v0.3

19

PIN INFORMATION

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