Mitel NWK954 manual Pin Descriptions, Network Interface, Continues…, Expansion Port

NWK954

PIN DESCRIPTIONS

Active low signals are denoted by the _N suffix; all other signals are active high

Network Interface

Signal	Pin no.	Type		Description
P0_RXIP	24	Analog input		(1) Differential receive signal from port 0 magnetics
P0_RXIN	23	Analog input		(2) Differential receive signal from port 0 magnetics
P0_TXOP	31	Analog output		(1) Differential transmit signal to port 0 magnetics
P0_TXON	30	Analog output		(2) Differential transmit signal to port 0 magnetics
P0_TXREF	27	Analog output		Port 0 transmitter current setting pin, grounded externally
P1_RXIP	41	Analog input		(1) Differential receive signal from port 1 magnetics
P1_RXIN	42	Analog input		(2) Differential receive signal from port 1 magnetics
P1_TXOP	34	Analog output		(1) Differential transmit signal to port 1 magnetics
P1_TXON	35	Analog output		(2) Differential transmit signal to port 1 magnetics
P1_TXREF	38	Analog output		Port 1 transmitter current setting pin, grounded extemally
P2_RXIP	56	Analog input		(1) Differential receive signal from port 2 magnetics
P2_RXIN	55	Analog input		(2) Differential receive signal from port 2 magnetics
P2_TXOP	63	Analog output		(1) Differential transmit signal to port 2 magnetics
P2_TXON	62	Analog output		(2) Differential transmit signal to port 2 magnetics
P2_TXREF	59	Analog output		Port 2 transmitter current setting pin, grounded extemally
P3_RXIP	73	Analog input		(1) Differential receive signal from port 3 magnetics
P3_RXIN	74	Analog input		(2) Differential receive signal from port 3 magnetics
P3_TXOP	66	Analog output		(1) Differential transmit signal to port 3 magnetics
P3_TXON	67	Analog output		(2) Differential transmit signal to port 3 magnetics
P3_TXREF	70	Analog output		Port 3 transmitter current setting pin, grounded extemally
			Table 4
Expansion Port
Signal	Pin no.	Type		Description
IRD4	1	High drive open		Inter-repeater data. Transfers 5-bit symbol data between
IRD3	128	drain digital		NWK954s on the local expansion bus, and to/from the
IRD2	127	output and digital		backplane drivers. Transfers are synchronous to BPCLK.Require
IRD1	98	input with pull-up		external pull-ups for correct operation.
IRD0	97
LACTOUT_N	2	High drive digital		Local activity output. Indicates receive activity in this
		output		NWK954. Connects to all other NWK954s on the local
				expansion bus. Output changes asynchronously.
LACTIN_N5	10	Digital input,		Local activity inputs. One input from each NWK954 on
LACTIN_N4	9	no pull-up		the local expansion bus to indicate receive activity. Unused
LACTIN_N3	8			inputs must be pulled high or connected directly to
LACTIN_N2	7			DIGVDD. Inputs are sampled on on the rising edge of TXCLKIN.
LACTIN_N1	6
BPACTOUT_N	105	Standard digital		Backplane activity output. Indicates receive activity on
		output		any of the NWK954s on the local expansion bus. Drives
				the backplane through an external driver. Only one of the
				local NWK954s is required to drive this signal, the others
				should be left unconnected. Output changes asynchronously.
			Table 5		Continues…

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