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3-6 Technical Specifications
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 3.4 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
Table 3.5 LED Connector J4
Signal Name Pin
LED+ 1
LED− 2
LED− 3
LED+ 4