LSI 8751D 3.2.3 The LED Interface, Table 3.5 LED Connector J4, Table 3.4 SCSI Connectors J2 and J3

Table 3.4 SCSI Connectors J2 and J3

Signal Name	Pin	Signal Name	Pin	Signal Name	Pin	Signal Name	Pin
+DB(12)	1	TERMPWR	18	− DB(12)	35	TERMPWR	52
+DB(13)	2	RESERVED	19	− DB(13)	36	RESERVED	53
+DB(14)	3	+ATN	20	− DB(14)	37	-ATN	54
+DB(15)	4	GND	21	− DB(15)	38	GND	55
+DB(P1)	5	+BSY	22	− DB(P1)	39	− BSY	56
GND	6	+ACK	23	GND	40	− ACK	57
+DB(0)	7	+RST	24	− DB(0)	41	− RST	58
+DB(1)	8	+MSG	25	− DB(1)	42	− MSG	59
+DB(2)	9	+SEL	26	− DB(2)	43	− SEL	60
+DB(3)	10	+C/D	27	− DB(3)	44	− C/D	61
+DB(4)	11	+REQ	28	− DB(4)	45	− REQ	62
+DB(5)	12	+I/O	29	− DB(5)	46	− I/O	63
+DB(6)	13	GND	30	− DB(6)	47	GND	64
+DB(7)	14	+DB(8)	31	− DB(7)	48	− DB(8)	65
+DB(P)	15	+DB(9)	32	− DB(P)	49	− DB(9)	66
DIFFSENS	16	+DB(10)	33	GND	50	− DB(10)	67
TERMPWR	17	+DB(11)	34	TERMPWR	51	− DB(11)	68

3.2.3 The LED Interface

The LED interface on the LSI8751D is a four-wire arrangement that allows the user to connect an LED harness to the board. The GPIO0_FETCH line (maximum output low voltage 0.4 V and minimum output low current 16 mA) is pulled low to complete the circuit when a harness with an LED is attached. The connector on the LSI8751D is J4.

Table 3.5 LED Connector J4

Signal Name	Pin
LED+	1
LED−	2
LED−	3
LED+	4

3-6 Technical Specifications