Mitel NWK954 manual Clocks and Controls, LED Drivers

				NWK954
LED Drivers
Signal	Pin no.	Type		Description
COLLED_N	109	Standard		Collision LED. Drives an LED to indicate that a collision
		digital output		has occurred either locally or elsewhere in the stack.
P0_RXLED_N	124	Standard		Port 0 activity LED. Drives an LED to indicate link/activity
		digital output		on port 0. The LED is turned on when a link is established
				and flashes off when a packet is being received.
P1_RXLED_N	122	Standard		Port 1 activity LED. Drives an LED to indicate link/activity on
		digital output		port 1. The LED is turned on when a link is established and
				flashes off when a packet is being received.
P2_RXLED_N	120	Standard		Port 2 actlvlty LED. Drives an LED to indicate link/activity on
		digital output		port 2. The LED is turned on when a link is established and
				flashes off when a packet is being received.
P3_RXLED_N	118	Standard		Port 3 activlty LED. Drives an LED to indicate link/activity on
		digital output		port 3. The LED is turned on when a link is established and
				flashes off when a packet is being received.
P0_ERLED_N	123	Standard		Port 0 error LED. Drives an LED to indicate an error on
		digital output		port 0. See the text for a full description.
P1_ERLED_N	121	Standard		Port 1 error LED. Drives an LED to indicate an error on
		digital output		port 1. See the text for a full description.
P2_ERLED_N	119	Standard		Port 2 error LED. Drives an LED to indicate an error on
		digital output		port 2. See the text for a full description.
P3_ERLED_N	117	Standard		Port 3 error LED. Drives an LED to indicate an error on
		digital output		port 3. See the text for a full description.
ACTLED_N4	116	Standard		Utilization LEDs. Drives 5 LEDs to indicate utilization of the
ACTLED_N3	115	digital outputs		network segment. See the text for a full description.
ACTLED_N2	114
ACTLED_N1	113
ACTLED_N0	112
			Table 6
Clocks and Controls
Signal	Pin no.	Type		Description
TXCLKIN	86	Digital input		25MHz reference clock. Supplied from an external source
		no pull-up		to all NWK954s on the local expansion bus.
RESET_N	5	Open drain		Asynchronous reset. This signal is driven low by the on-
		digital output and		chip power-on reset circuit, but may also be driven low
		digital input,		externally for manual reset. Must be pulled high by an
		no pull-up		external 5kΩ resistor.
PSEN0	87	Digital inputs		Power-savlng enables. 11 enables power-saving on all
PSEN1	88	with pull-ups		ports. 01 suppresses power saving on port 0, 10
				suppresses power saving on port 3, 00 suppresses power-
				saving on all ports.
TA4	13	Digital inputs,		Scrambler seed. Each ot the four PHY modules in the
TA3	14	no pull-ups		NWK954 is provided with a unique scrambler seed derived
TA2	15			from TA[4:2]. To ensure that all ot the local PHYs have
				unique scrambler seeds, each NWK954 connected to the
				local expansion bus should have its TA[4:2] input set to a
				unique value by connecting to DIGVDD or DIGGND.
			Table 7

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