Mitel NWK954 manual GP128, Functional Description, Overvlew, Compliance with Standards

NWK954

IRD4

LACTOUT_N DIGVDD1 DIGGND1 RESET_N LACTIN_N1 LACTIN_N2 LACTIN_N3 LACTIN_N4 LACTIN_N5

TDC

TDIO

TA4

TA3

TA2

SUBVDD1

P0_RXGND3

P0_RXVDD3

P0_RXVDD2

P0_RXGND2

P0_RXGND1

P0_RXVDD1

P0_RXIN

P0_RXIP

P0_TXVDD3

P0_TXGND3

P0_TXREF

P0_TXGND2

P0_TXVDD2

P0_TXON

P0_TXOP

P0_GND1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

IRD3		IRD2		DIGGND2		DIGVDD2		P0 RXLED N	P0 ERLED N		P1 RXLED N		P1 ERLED N		P2 RXLED N		P2 ERLED N		P3 RXLED N		P3 ERLED N		ACTLED N4		ACTLED N3		ACTLED N2		ACTLED N1		ACTLED N0		DIGGND3	DIGVDD3		COLLED N		BPDOE N		BPDIE N		BPCOLOE N		BPACTOUT N		BPCOLIN N		BPACTIN N1		BPACTIN N2		BPACTIN N3		DIGGND4	DIGVDD4		IRD1		IRD0
128	127		126		125		124		123	122		121		120		119		118		117		116		115		114		113		112		111		110	109		108		107		106		105		104		103		102		101		100		99	98		97

NWK954

33	34		35		36		37		38		39		40		41		42		43		44		45		46		47		48		49		50		51		52		53		54		55		56		57		58		59		60		51		62		63		64
P1 TXGND1		P1 TXOP		P1 TXON		P1 TXVDD2		P1 TXGND2		P1 TXREF		P1 TXGND3		P1 TXVDD3		P1 RXIP		P1 RXIN		P1 RXVDD1		P1 RXGND1		P1 RXGND2		P1 RXVDD2		P1 RXVDD3		P1 RXGND3		P2 RXGND3		P2 RXVDD3		P2 RXVDD2		P2 RXGND2		P2 RXGND1		P2 RXVDD1		P2 RXIN		P2 RXIP		P2 TXVDD3		P2 TXGND3		P2 TXREF		P2 TXGND2		P2 TXVDD2		P2 TXON		P2 TXOP		P2 TXGND1

96

95

94

93

92

91

90

89

88

87

86

85

84

83

82

81

80

79

78

77

76

75

74

73

72

71

70

69

68

67

66

65

BPCLK BPCOL_N DIGGND5 DIGVDD5 BPACTIN_N4 BPACTIN_N5 BPACTIN_N6 BPACTIN_N7 PSEN0 PSEN1

TXCLKIN

DIGGND6

DIGVDD6

VREFGND VREFVDD SUBVDD2

P3_RXGND3

P3_RXVDD3

P3_RXVDD2

P3_RXGND2

P3_RXGND1 P3–RXVDD1 P3_RXIN P3_RXIP

P3_TXVDD3

P3_TXGND3

P3_TXREF

P3_TXGND2

P3_TXVDD2

P3_TXON

P3_TXOP

P3_TXGND1

GP128

Fig. 3 Pin connections – top view

FUNCTIONAL DESCRIPTION

Overvlew

The NWK954 is a mixed-signal CMOS device which integrates all of the functions required for an unmanaged 4- port 100BASE TX repeater as defined in the IEEE 802.3 Standard. The device incorporates all of the necessary 100BASE-TX PHY functions to allow direct interfacing to a quad 1:1 magnetics module with a modest number of external passive components. The built-in expansion port allows cascading of up to 6 NWK954s to build a 24-port repeater with no additional components and also allows stacking of up to eight 24-port repeaters with the addition of simple backplane driver/receiver components. The operating status of the device is indicated on 14 outputs designed to directly drive LEDs. This high level of integration combined with low power consumption and low pin count offers an efficient and low cost solution for Fast Ethernet unmanaged repeater design.

Compliance with Standards

The NWK954 is designed for compliance with the IEEE 802.3 Standard, Clause 24 (100BASE-X PCS and PMA), Clause 25 (100BASE-TX PMD) and Clause 27 (Repeater for 100Mb/s Baseband Networks). Clause 25 references the FDDI twisted pair PMD Standard, henceforth referred to as TP-PMD.

Compatibility With Other Devices

The NWK954 is designed to connect directly to 5 other NWK954 devices using the expansion bus. The Expansion Port is identical to that used on the NWK950 Repeater Controller. The Expansion Port may be connected to a backplane through external driver/receivers. The backplane specification is identical to that used by the NWK950, so repeaters using the NWK950 may be stacked with repeaters using the NWK954.

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