Avago Technologies LSI21040 - Manual (Page 54)

3-10 Specifying the Technical Characteristics
3.2.3 SCSI Activity LED Interface
The SCSI activity LED interface on the LSI21040 is a four-wire
arrangement that allows you to connect an LED harness to the board.
The buffered 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. Connector J6 is the
SCSI busy LED connector.
Table 3.7 provides the signal definitions for
the SCSI Busy LED connector.
3.3 Subsystem and Subsystem Vendor ID
The Subsystem ID and System Vendor ID for the LSI21040 are provided
in
Table 3.8 . The EEPROM of the LSI21040 contains the ID numbers.
During system initialization, the ID numbers are loaded into the
Subsystem Vendor ID and Subsystem ID registers of the LSI21040 SCSI
Controller (the LSI53C1010). For more information on the operation of
the Subsystem Vendor ID and Subsystem ID registers, refer to the
LSI53C1010-33 PCI to Dual Channel Ultra3 SCSI Multifunction
Controller Technical Manual.
Table 3.7 LED Connector J6
Signal Name Pin
Channel A LED+ 1
Channel A LED
−
2
Channel B LED– 3
Channel B LED+ 4
Table 3.8 Subsystem and Subsystem Vendor ID
Subsystem ID Number
Subsystem Vendor ID 1000
Subsystem ID 1040