SMCXXXAF Datasheet, PDF(14/82 Page) Numonyx B.V – 32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte and 512 Mbyte 3.3 V / 5 V supply CompactFlash™ card

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SMCXXXAF Datasheet, PDF (14/82 Pages) Numonyx B.V – 32 Mbyte, 64 Mbyte, 128 Mbyte, 256 Mbyte and 512 Mbyte 3.3 V / 5 V supply CompactFlash™ card

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Electrical interface

4

Electrical interface

SMCxxxAF

4.1

Electrical description

The CompactFlash memory card operates in three basic modes:

â PC card ATA using I/O mode,

â PC card ATA using memory mode,

â True IDE mode, which is compatible with most disk drives.

The signal/pin assignments are listed in Table 8 where Low active signals have a âââ prefix.

Pin types are Input, Output or Input/Output.

The configuration of the card is controlled using the standard PCMCIA Configuration

registers starting at address 200h in the attribute memory space of the memory card. For

True IDE mode, pin 9 is grounded.

Table 9 describes the I/O signals. Inputs are signals sourced from the host while outputs are

signals sourced from the card. The signals are described for each of the three operating

modes.

All outputs from the card are totem pole except the data bus signals that are bi-directional

tri-state. Refer to Section 4.2: Electrical specification for definitions of Input and Output type.

Table 8.

Pin

num

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

Pin assignment and pin type

PC card memory mode

PC card I/O mode

Signal

name

Pin

type

In, Out

type

Signal

name

Pin In, Out

type type

GND

D03

D04

D05

D06

D07

âCE1

A10

âOE

A09

A08

A07

VCC

A06

A05

A04

A03

A02

A01

Ground

I/O I1Z,OZ3

I/O I1Z,OZ3

I/O I1Z,OZ3

I/O I1Z,OZ3

I/O I1Z,OZ3

I

I3U

I

I1Z

I

I3U

I

I1Z

I

I1Z

I

I1Z

Power

I

I1Z

I

I1Z

I

I1Z

I

I1Z

I

I1Z

I

I1Z

GND

D03

D04

D05

D06

D07

âCE1

A10

âOE

A09

A08

A07

VCC

A06

A05

A04

A03

A02

A01

Ground

I/O I1Z,OZ3

I/O I1Z,OZ3

I/O I1Z,OZ3

I/O I1Z,OZ3

I/O I1Z,OZ3

I

I3U

I

I1Z

I

I3U

I

I1Z

I

I1Z

I

I1Z

Power

I

I1Z

I

I1Z

I

I1Z

I

I1Z

I

I1Z

I

I1Z

True IDE mode

Signal

name

GND

D03

D04

D05

D06

D07

âCS0

A10(1)

âATASEL

A09(1)

A08(1)

A07(1)

VCC

A06(1)

A05(1)

A04(1)

A03(1)

A02

A01

Pin

type

I/O

I/O

I/O

I/O

I/O

I

I

I

I

I

I

I

I

I

I

I

I

In, Out

type

Ground

I1Z,OZ3

I1Z,OZ3

I1Z,OZ3

I1Z,OZ3

I1Z,OZ3

I3Z

I1Z

I3U

I1Z

I1Z

I1Z

Power

I1Z

I1Z

I1Z

I1Z

I1Z

I1Z

14/82

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