DM9302 데이터 시트보기 (PDF) - Davicom Semiconductor, Inc.

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DM9302

10/100Mbps Ethernet Fiber/Twisted Pair Media Converter with Local bus

Davicom Semiconductor, Inc. 

DM9302

10/100Mbps Ethernet Fiber/Twisted Pair Media Converter with Local bus

5. PIN DESCRIPTION

I = Input, O = Output, I/O = Input / Output, O/D = Open Drain, P = Power, PD=internal pull-low (approx. 50K ohm)

# = asserted Low

5.1 Processor Bus interface

Pin No.

2

Pin Name

IOR#

3

IRQ

5,6,7,9,10,12,14,15,

17,18,19,20,21,22,24,25

60

SD0~15

CMD

62

CS#

63

IOW#

I/O

Description

I Processor Read Command

Default is low active. The polarity can be changed by

setting EEPROM.

O Interrupt Request

Default is high active and non-open collector type. Its

polarity and output type can be changed by strap pins

or EEPROM setting.

I/O Processor Data Bus bit 0~15

I Command Type

Upon the IO transaction,

when CMD is high, SD0~15 reflect the value of DATA port

when CMD is low, SD0~15 reflect the value of INDEX port

I Processor Chip Select Command

Default is low active. Its polarity can be changed by

EEPROM setting.

I Processor Write Command

Default is low active. Its polarity can be changed by

EEPROM setting.

5.2 EEPROM Interfaces

Pin No.

27

28

29

Pin Name

EEDIO

EECK

EECS

I/O

I,/O

O,PD

O,PD

Description

EEPROM Data In/Out

EEPROM Serial Clock

This pin is used as the clock for the EEPROM data transfer.

EEPROM Chip Selection.

12

Preliminary datasheet

DM9302-15-DS-P01

July 30, 2009

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