IP175ALF-DS-R04 datasheet(15/60 Pages) ETC2

15 / 60 page

IP175A LF

Preliminary Data Sheet

15/60

February 20, 2006

IP175A LF-DS-R08

Pin Descriptions (continued)

Pin no.

Label

Type

Description

Transceiver

127,

128,

11, 12,

18,19,

29, 30,

33, 34

RXIP0, RXIM0,

RXIP1, RXIM1,

RXIP2, RXIM2,

RXIP3, RXIM3,

RXIP4, RXIM4

TP receive

3, 4,

8, 9,

21, 22,

26, 27,

37, 38

TXOP0,

TXOM0,

TXOP1,

TXOM1,

TXOP2,

TXOM2,

TXOP3,

TXOM3,

TXOP4,

TXOM4

TP transmit

BGRES

Band gap resister.

It is connected to GND through a 6.2 k ohms resistor. Please

refer to application circuit for more information.

125, 41,

42, 43,

FXSD0~4

100Base-FX Signal detect

IP175A LF will latch the value on FXSDx pins at the end of reset

to decide if the port works at 100BaseFX mode. A port works in

100BaseFX mode, if its corresponding signal FXSDx > 0.6v at

the end of reset. FXSDx should be connected to GND if the port

works in TP mode. That is, a port is a fiber port if its FXSDx is

connected to the SD of fiber MAU and a port is a TP port if its

FXSDx is connected to GND.

The SD of fiber port is active if the voltage of FXSDx is higher

than 1.2v. It is used to inform IP175A LF if the fiber is plugged or

not.

Pin no.

Label

Type

Description

Misc.

123

25M system clock input

122

Crystal pin

RESETB

Reset, low active

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