AM79C974KCW 데이터 시트보기 (PDF) - Advanced Micro Devices

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AM79C974KCW

PCnet™-SCSI Combination Ethernet and SCSI Controller for PCI Systems

Advanced Micro Devices 

AMD

AMENDMENT

PIN DESIGNATIONS (continued)

Quick Reference Pin Description

Pin Name

Description

SCSI SPECIFIC

SCSI Interface

SD [7:0]

SCSI Data

SDP

SCSI Data Parity

MSG

Message

C/D

Command/Data

I/O

Input/Output

ATN

Attention

BSY

Busy

SEL

Select

SCSI^RST

REQ

SCSI Bus Reset

Request

ACK

Acknowledge

Miscellaneous

SCSI CLK

SCSI Core Clock

RESERVE

Reserved, DO NOT CONNECT

Power Management

PWDN

Power Down Indicator

Test Interface

BUSY

NAND Tree Test Output

Power Supplies

AVDD

Analog Power

AVSS

Analog Ground

VDD, DVDD

Digital Power

VSS, DVSS

Digital Ground

VDDB, VDDBS

I/O Buffer Power

VSSB, VSSBS

I/O Buffer Ground

Type

IO

IO

I

I

I

O

IO

IO

IO

I

O

I

I

I

O

P

P

P

P

P

P

Driver

OD48

OD48

OD48

OD48

OD48

OD48

OD48

O3

NA

NA

NA

NA

NA

NA

# Pins

8

1

1

1

1

1

1

1

1

1

1

1

1

1

1

4

2

5

9

5

11

Listed by Driver Type

The following table describes the various types of drivers that are implemented in the PCnet-SCSI controller. Current

is given as milliamperes:

Name

TS3

TS6

O3

O6

O8

OD6

OD48

LED

Type

Tri-StateTM

Tri-State

Totem Pole

Totem Pole

Totem Pole

Open Drain

Open Drain

LED

IOL (mA)

IOH (mA)

pF

3

–2.0

50

6

–2.0

50

3

–0.4

50

6

–0.4

50

8

–0.4

50

6

NA

50

48

NA

—

12

–0.4

50

8

Am79C974

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