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CL-PD6833

PCI-to-CardBus Host Adapter

Cirrus Logic 

CL-PD6833

PCI-to-CardBus Host Adapter

Table 2-1. PCI Bus Interface Pins (cont.)

Pin Name

CLKRUN#

GNT#

REQ#

PCI_VCC

Description

Pin Number Qty. I/O Pwr. Drive

Clock Run: This pin is an input to indicate the status

of PCI_CLK and an open-drain output to request the

starting or speeding up of PCI_CLK. This pin com-

plies with the PCI Mobile Design Guide.

Grant: This signal indicates that access to the bus

has been granted.

Request: This signal indicates to the arbiter that the

CL-PD6833 requests use of the bus.

PCI Bus VCC: These pins can be connected to either

a 3.3- or 5-V power supply. The PCI bus interface pin

outputs listed in this table (Table 2-1) operate at the

voltage applied to these pins, independent of the volt-

age applied to other CL-PD6833 pin groups.

208

2

3

6, 21, 37, 50

1

I/O

4

1

I

–

1

O

4

4 PWR –

PCI

Spec.

–

PCI

Spec.

–

Table 2-2. Socket Interface Pins

Pin Name1

Description2

Pin Number

Qty. I/O Pwr. Drive

Socket A Socket B

-REG/

CCBE3#

Register Access: During PC Card 16

memor y cycles, this output chooses

between attribute and common memory.

During I/O cycles for non-DMA transfers,

this signal is active (low). During ATA

mode, this signal is always inactive. For

DMA cycles on the CL-PD6833 to a DMA-

112

capable card, -REG is inactive during I/O

cycles to indicate DACK to the PC Card

16.

In CardBus mode, this pin is the command

and byte enable 3.

Card-

188

1

I/O 2 or 3 Bus

spec.

A[25:24]/

CAD[19, 17]

PC Card 16 socket address 25:24 outputs.

Card-

In CardBus mode, these pins are the 102, 99

176, 174

2

I/O 2 or 3 Bus

CardBus address/data bits 19 and 17,

spec

respectively.

A23/

CFRAME#

PC Card 16 socket address 23 output.

In CardBus mode, this pin is the CardBus

96

FRAME# signal.

172

1

I/O

PU

2 or 3

Card-

Bus

spec

A22/

CTRDY#

PC Card 16 socket address 22 output.

In CardBus mode, this pin is the CardBus

94

TRDY# signal.

170

1

I/O

PU

2 or 3

Card-

Bus

spec

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

15

PIN INFORMATION

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