SMSC TMC2005-JT DESCRIPTION OF PIN FUNCTIONS, NAME, NOTE, PIN NO, DESCRIPTION, INPUT/OUTPUT

ARCNET 5 Port HUB Controller

Datasheet

DESCRIPTION OF PIN FUNCTIONS

PIN NO.	NAME	INPUT/OUTPUT	DESCRIPTION	NOTE
1	TXENB1	OUTPUT	Port B-1 Tx output to media transceiver
			Setting for traffic release time (It should
2	HM	INPUT	be open for normal operation.)	Pull-up
			Port EXT. Polar assignment for EXTRX
3	SE	INPUT	input (0:active Hi, 1:active Low)	Pull-up
4	NC		Reserved. It should be open.
			Port EXT. Polar assignment of EXTTX
5	LE	INPUT	output (0:active Low, 1:active Hi)	Pull-up
			Port EXT. RX-Data input from media
6	EXTRX	INPUT	transceiver.	Pull-up
			Port EXT. Output mode assignment of
			EXTTX (0:pulse output, 1:Tx control
7	ME	INPUT	output)	Pull-up
8	VSS1		Ground
9	EXTTX	OUTPUT	Port EXT. Output to media transceiver.
10	VDD1		Power Supply
11	CKO	OUTPUT	Clock Output
12	VSS2		Ground
13	CKM2	INPUT	Network speed (data rate) setting.	Pull-up
14	CKM1	INPUT		Pull-up
15	CKM0	INPUT		Pull-up
16	NC		Reserved. It should be open.
17	RXFLT	INPUT	Test Pin. It should be open.	Pull-up
			Test Pin for PLL.. It should connected to
18	nPLLTST	INPUT	VDD (Set to high)
19	VDD2		Power Supply
20	XTLI	INPUT	X'tal input/External clock input.
21	XTLO	OUTPUT	X'tal output
22	VSS4		Ground
23	NC		Reserved. It should be open.
24	VDD4		Power Supply
25	VDD3		Power Supply
26	AVDD		Analog Power Supply
27	RO	OUTPUT	VCO output for internal PLL.
			Connection pin to loop filter for internal
28	LP	OUTPUT	PLL.
29	AGS	INPUT	Analog sense pin for internal PLL.
30	AVSS		Analog Ground
31	VSS3		Ground
32	VSS5		Ground
33	NC		Reserved. It should be open.
			Port EXT. Open-drain mode (0:open-
34	nEXTOD	INPUT	drain output, 1:normal output)	Pull-up
35	nMBE	INPUT	Port EXT. Noise cut (0:on, 1:off)	Pull-up
36	nMBB	INPUT	Port A0/A1 Noise cut (0:on, 1:off)	Pull-up
37	nMBA	INPUT	Port B0/B1 Noise cut (0:on, 1:off)	Pull-up
			Port EXT. Jitters correct mode (0:big
38	nBJE	INPUT	jitters mode, 1:normal mode)	Pull-up
			Port A0/A1 Jitters correct mode (0:big
39	nBJB	INPUT	jitter mode, 1:normal mode)	Pull-up
			Port B0/B1 Jitter correct mode (0:big
40	nBJA	INPUT	jitter mode, 1:normal mode)	Pull-up
41	VSS6		Ground
42	nRST	INPUT	Internal reset signal (active Low)	Pull-up
43	nCKOEN	INPUT	Enable of CKO output.	Pull-up
Revision 1.1 (07-24-07)			Page 6	SMSC TMC2005-JT

DATASHEET