Dell manual J9 I2C Interface Connector, J5 Serial Port, Ta b l e 8 3 . J9, N o u t

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Ta b l e 8 - 2 . J 1 Ter mi n a t i o n E n a b l e S et t i n g s (continued)

Type of SCSI Termination	J10 Setting
Permanently disable all onboard SCSI termination.	Short pins 2-3
Permanently enable all onboard SCSI termination.	OPEN (default)

J9 I2C Interface Connector

J9 is a four-pin header that allows the i960RM core processor to serve as a master and slave device that resided on the I2C bus when used with the I2C bus interface unit. Attach a four-wire cable from J9 to the I2C Bus Interface Unit. Table 8-3 shows the J9 connector pinout.

Ta b l e 8 - 3 . J9		I 2 C I n t er f a c e C on n e c t o r
P i n o u t
Pin	Description
1	SDA
2	GND
3	SCL
4	VCC

J5 Serial Port

J5 is a 3-pin connector that attaches to a serial cable. Table 8-4 displays the pinout for J5.

Tab l e 8 - 4 . J 5 S e r i a l Po r t P i no u t

Pin Description

1RXD

2TXD

3GND

106

PERC 3/SC Hardware Installation