Nortel Networks MSC8101 ADS EXPD0, EXPD1, EXPD2, EXPD3, EXPD4, EXPD5, EXPD6, EXPD7, EXPD8, EXPD9

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

TABLE B1-2. P1 - System Expansion - Interconnect Signals

Pin No.	Signal Name	Attribute	Description
C11	IRQ6b	I,P.U.	Interrupt Request 6 . Connected to MSC8101‘s DP6//IRQ6b/
			DACK3 signal. Pulled up on the ADS with a 10 KΩ resistor. This
			line is shared with the ATM UNI’s interrupt line and therefore,
			when driven by an external tool, MUST be driven with an Open
			Drain gate. Failure to do so may result in permanent damage
			to the MSC8101 or to ADS logic.
C12	IRQ7b	I.P.U.	Interrupt Request 7 . Connected to MSC8101‘s DP7/IRQ7b/
			DACK4 signal. Pulled up on the ADS with a 10 KΩ resistor. This
			line is shared with the Fast Ethernet transceiver’s interrupt line
			and therefore, when driven by an external tool, MUST be driven
			with an Open Drain gate. Failure to do so might result in
			permanent damage to the MSC8101 and / or to ADS logic.
C13	GND	P	Digital Ground. Connected to main GND plane of the ADS.
C14	EXPD0	I/O, T.S.	Expansion Data (0a:15). This is a double buffered version of the
			PPC bus D(0:15) lines, controlled by on-board logic. These lines
C15	EXPD1
			will be driven only if BTOLCS1b or BTOLCS2b are asserted.
			Otherwise they are tristated.
C16	EXPD2
			The direction of these lines is determined by buffered BCTL0, in
C17	EXPD3		function of R~/W.
C18	EXPD4
C19	EXPD5
C20	EXPD6
C21	EXPD7
C22	EXPD8
C23	EXPD9
C24	EXPD10
C25	EXPD11
C26	EXPD12
C27	EXPD13
C28	EXPD14
C29	EXPD15
C30	IRQ4b	I.P.U.	Interrupt Request 4. Connected to MSC8101‘s DP4/IRQ4b/
			DREQ3 signal. Pulled up on the ADS with a 10 KΩ resistor. This
			line is shared with the Fast Ethernet transceiver’s interrupt line
			and therefore, when driven by an external tool, MUST be driven
			with an Open Drain gate. Failure to do so might result in
			permanent damage to the MSC8101 and / or to ADS logic.
C31	IRQ5b	I.P.U.	Interrupt Request 5. Connected to MSC8101‘s DP5/IRQ5b/
			DREQ5 signal. Pulled up on the ADS with a 10 KΩ resistor. This
			line is shared with the Fast Ethernet transceiver’s interrupt line
			and therefore, when driven by an external tool, MUST be driven
			with an Open Drain gate. Failure to do so might result in
			permanent damage to the MSC8101 and / or to ADS logic.

B-80 MSC8101ADS RevB User’s Manual MOTOROLA

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