SMSC TMC2005-JT NAME, NOTE, NAME, PIN NO, FEATURE, DESCRIPTION, DESCRIPTION, INPUT/OUTPUT, INPUT/OUTPUT, TX/RX Interface

								ARCNET 5 Port HUB Controller
									Datasheet
PIN NO.		NAME			INPUT/OUTPUT		DESCRIPTION		NOTE
44		VDD5					Power Supply.
45		nP1BAK				OUTPUT	nPULSE1 output (for backplane mode).
46		nPULSE2				OUTPUT	nPULSE2 output (for normal mode).
47		nPULSE1				OUTPUT	nPULSE1 output (for normal mode)
48		VSS7					Ground
							Port A-0 Rx-data input from media
49		RXINA0				INPUT	transceiver.		Pull-up
							Port A. Polar assignment for RXINA0/A1
50		SA				INPUT	output (0:active Hi, 1:active Low)		Pull-up
51		TXENA0				OUTPUT	Port A-0 Tx output to media transceiver.
							Port A. Polar assignment for TXENA0/A1
52		LA				INPUT	output (0:active Low, 1:active Hi)		Pull-up
							Port A-1 Rx-data input from media
53		RXINA1				INPUT	transceiver.		Pull-up
							Port A. Mode assignment for
							TXENA0/A1 (0:pulse output, 1:Tx control
54		MA				INPUT	output)		Pull-up
55		TXENA1				OUTPUT	Port A-1 Tx output to media transceiver.
56		VDD6					Power Supply
57		NC					Reserved. It should be open.
58		VSS8					Ground
							Port B-0 Rx-data input from media
59		RXINB0				INPUT	transceiver.		Pull-up
							Port B. Polar assignment for RXINA0/A1
60		SB				INPUT	input (0:active Hi, 1:Active Low)		Pull-up
61		TXENB0				OUTPUT	Port B-0 Tx output to media transceiver.
							Port B. Polar assignment for TXENA0/A1
62		LB				INPUT	output (0:active Low, 1:active Hi)		Pull-up
							Port B-1 Rx-data input from media
63		RXINB1				INPUT	transceiver.		Pull-up
							Port B. Mode assignment for
							TXENA0/A1 (0:pulse output, 1:TX control
64		MB				INPUT	output)		Pull-up
Note: Pull-up: Input with a pull-up resistor 70KΩ ± 30%
TX/RX Interface
				FEATURE		NAME	INPUT/OUTPUT	DESCRIPTION
	RX Port					RXINA [0:1]	INPUT	Setup the polarity by SA, SB, SE.
						RXINB [0:1]
						EXTRX
	RX Port			Polar		SA, SB, SE	INPUT	Setup the polarity of RXINA [0:1],
			Assignment					RXINB [0:1], EXTTX.
								0 : active H
								1: active L
	TX Port			TX Control		TXENA [0:1]	OUTPUT	TX data pulse (Mx=0) or TX
						TXENB [0:1]		enable signal (Mx=1).
						EXTTX		Setup TX mode by MA, MB, ME.
								Setup the polarity by LA, LB, LE
	TX Port			TX Data		nPULSE [1:2]	OUTPUT	TX pulse data into HYC9068S-
				Output				SK/9088S-SK when ARCNET
								chip is at normal mode.
								The pulse is always active Low.
	TX Port					nP1BAK	OUTPUT	TX pulse data into RS485 driver
								or HYC2485S/2488S when
								ARCNET chip is at backplane
SMSC TMC2005-JT							Page 7		Revision 1.1 (07-24-07)

DATASHEET