SMCXXXBF datasheet(17/91 Pages) STMICROELECTRONICS

17 / 91 page

SMCxxxBF

Electrical interface

17/91

D10(3)

I/O

I1Z,OZ3

D10(3)

I/O

I1Z,OZ3

D10(3)

I/O

I1Z,OZ3

GND

Ground

GND

Ground

GND

Ground

For True IDE Mode, pin 9 is grounded.

The signal should be grounded by the host.

These signals are required only for 16 bit accesses and not required when installed in 8 bit systems. Devices should allow

for 3-state signals not to consume current.

The signal should be tied to VCC by the host.

The -CSEL signal is ignored by the Card in PC Card modes. However, because it is not pulled up on the Card in these

modes it should not be left floating by the host in PC Card modes. In these modes, the pin is normally connected by the

host to PC Card A25 or grounded by the host.

When the device does not operate in DMA mode, the signal should be held High or tied to VCC by the host. To ensure

proper operation with older hosts when DMA mode is disabled, the Card should ignore the –DMACK signal.

Table 8.

Pin Assignment and Pin Type (continued)

Num

PC Card Memory Mode

PC Card I/O Mode

True IDE Mode

Signal

Name

Type

In, Out

Type

Signal

Name

Type

In, Out

Type

Signal

Name

Type

In, Out

Type

Table 9.

Signal Description

Signal Name

Dir.

Description

A10 to A0

(PC Card Memory Mode)

8,10,11,12,

14,15,16,17,

18,19,20

Used (with –REG) to select: the I/O port address registers,

the memory mapped port address registers, a Byte in the

Card information structure and its configuration control and

status registers.

A10 to A0

(PC Card I/O Mode)

Same as PC Card Memory Mode

A2 to A0

(True IDE Mode)

Only A2 to A0 are used to select the one of eight registers in

the Task File, the remaining lines should be grounded.

BVD1

(PC Card Memory Mode)

I/O

The battery voltage status of the Card, as no battery is

required it is asserted High.

–STSCHG

(PC Card I/O Mode)

Alerts the host to changes in the READY and Write Protect

states. Its use is controlled by the Card Configuration and

Status Register.

–PDIAG

(True IDE Mode)

The Pass Diagnostic signal in the Master/Slave handshake

protocol.

BVD2

(PC Card Memory Mode)

I/O

The battery voltage status of the Card, as no battery is

required it is asserted High.

–SPKR

(PC Card I/O Mode)

The Binary Audio output from the Card. It is asserted High

as audio functions are not supported.

–DASP

(True IDE Mode)

This input/output is the Disk Active/Slave Present signal in

the Master/Slave handshake protocol.

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