UPD72850A Просмотр технического описания (PDF) - NEC => Renesas Technology

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UPD72850A

IEEE1394 400Mbps PHY

NEC => Renesas Technology 

µPD72850A

1. PIN FUNCTIONS

1.1 Cable Interface Pins

Name

Pin No.

I/O

TpA0p

60

I/O

TpA0n

59

I/O

TpB0p

58

I/O

TpB0n

57

I/O

TpA1p

56

I/O

TpA1n

55

I/O

TpB1p

54

I/O

TpB1n

53

I/O

TpA2p

52

I/O

TpA2n

51

I/O

TpB2p

50

I/O

TpB2n

49

I/O

PORTDIS

64

I

PSEL

66

I

Function

First port twisted pair cable A positive phase I/O

First port twisted pair cable A negative phase I/O

First port twisted pair cable B positive phase I/O

First port twisted pair cable B negative phase I/O

Second port twisted pair cable A positive phase I/O

Second port twisted pair cable A negative phase I/O

Second port twisted pair cable B positive phase I/O

Second port twisted pair cable B negative phase I/O

Third port twisted pair cable A positive phase I/O

Third port twisted pair cable A negative phase I/O

Third port twisted pair cable B positive phase I/O

Third port twisted pair cable B negative phase I/O

Port disable.

SUS/RES(71pin)=“1”

This selected state will be loaded to Disabled bit which allocated PHY register

Port Status Page when power-on reset.

The PORTDIS pin is ignored except power-on reset.

1: All 3 ports will be disabled.

0: All 3 ports will be enabled.

SUS/RES(71pin)=“0”

Combination with PSEL(66pin) input the supported number of port will be

selected.

Please refer to PSEL.

Supported number of Port select (This function will be activated only under

SUS/RES=“0”).

1Port(Port0)

2Port(Port0,1)

3Port(Port0-2)

64pin

0

1

0

66pin

1

0

0

SUS/RES

71

CPS

43

When SUS/RES=“1”, this pin should be connected to AGND.

I

Suspend/Resume function select

1: Suspend/Resume on (P1394a draft 2.1 compliant)

0: Suspend/Resume off (P1394a draft 1.3 compliant)

I

Power cable status.

Connect to the cable through a 390 kΩ resistor.

0: Cable power fail

1: Cable power on

Data Sheet S14452EJ1V0DS00

7

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