DM9000BIEP datasheet(10/56 Pages) DAVICOM

номер детали	DM9000BIEP

подробное описание детали	Industrial-grade Ethernet Controller with General Processor Interface

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производитель	DAVICOM [Davicom Semiconductor, Inc.]

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DM9000BI

Industrial-grade Ethernet Controller with General Processor Interface

Preliminary

10

Version: DM9000BI-13-DS-P02

January 17, 2008

5. Pin Description

I = Input

O = Output

I/O = Input/Output

O/D = Open Drain

P = Power

# = asserted low

PD = internal pull-low about 60K

5.1 Processor Interface

Pin No.

Pin Name

Type

Description

35

IOR#

I,PD

Processor Read Command

This pin is low active at default, its polarity can be modified by EEPROM

setting. See the EEPROM content description for detail

36

IOW#

I,PD

Processor Write Command

This pin is low active at default, its polarity can be modified by EEPROM

setting. See the EEPROM content description for detail

37

CS#

I,PD

Chip Select

A default low active signal used to select the DM9000BI. Its polarity can

be modified by EEPROM setting. See the EEPROM content description

for detail.

32

CMD

I,PD

Command Type

When high, the access of this command cycle is DATA port

When low, the access of this command cycle is INDEX port

34

INT

O,PD

Interrupt Request

This pin is high active at default, its polarity can be modified by EEPROM

setting or by strap pin EECK. See the EEPROM content description for

detail

18,17,16,

14,13,12,

11,10

SD0~7

I/O,PD

Processor Data Bus bit 0~7

31,29,28,

27,26,25,

24,22

SD8~15

I/O,PD

Processor Data Bus bit 8~15

In 16-bit mode, these pins act as the processor data bus bit 8~15;

When EECS pin is pulled high , they have other definitions. See 8-bit

mode pin description for details.

5.1.1 8-bit mode pins

Pin No.

Pin Name

Type

Description

22

WAKE

O,PD Issue a wake up signal when wake up event happens

24

LED3

O,PD

Full-duplex LED

In LED mode 1, Its low output indicates that the internal PHY is operated

in full-duplex mode, or it is floating for the half-duplex mode of the internal

PHY

In LED mode 0, Its low output indicates that the internal PHY is operated

in 10M mode, or it is floating for the 100M mode of the internal PHY

Note: LED mode is defined in EEPROM setting.

25,26,27

GP6~4

O,PD

General Purpose output pins:

These pins are output only for general purpose that is configured by

register 1Fh.

GP6 pin also act as trap pin for the INT output type.

When GP6 is pulled high, the INT is Open-Drain output type;

Otherwise it is force output type.

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