IP178A 데이터 시트보기 (PDF) - Unspecified

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IP178A

8-Port 10/100 Ethernet Integrated Switch

Unspecified 

(Advance Version)

IP178A

PIN Description (continued)

Pin no.

174

175

176

177

Misc.

78

79

89

Label

EEDO

Type

IPL Data input of EEPROM

Description

EEDI

EECS

EESK

IPL/O

IPL/O

IPL/O

Data output of EEPROM

It is input during reset period. After reset, it is an output signal EEDI to read

EEPROM. After reading EEPROM, this pin becomes an output signal MRXD3, if

external MII port is enabled (MII_P0_EXT_EN=1); otherwise, it is an input signal.

Chip select of EEPROM

It is input during reset period. After reset, it is an output signal EECS to read

EEPROM. After reading EEPROM, this pin becomes an input signal.

Clock input of EEPROM

It is input during reset period. After reset, it is an output signal EESK to read

EEPROM. After reading EEPRM, this pin becomes an output signal MII_CLK, if

external MII port is enabled (MII_P0_EXT_EN=1); otherwise, it is an input signal.

OSCI

X2

RESETB

I 25Mhz system clock.

A 25Mhz clock from oscillator is fed to this pin. The X2 pin should be left open in

this application.

O Crystal pin

A 25Mhz crystal can be connected to OSCI and X2.

I Reset

It is low active. It must be hold for more than 1ms. It is Schmitt trigger input.

Preliminary, Specification subject to change without notice 6

IP178A-DS-P05

Sep. 09, 2002

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