Dell 3 - Manual (Page 108)

106 PERC 3/SC Hardware Installation
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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.
J5 Serial Port
J5 is a 3-pin connector that attaches to a serial cable. Table 8-4 displays the
pinout for J5.
Permanently disable all onboard SCSI termination. Short pins 2-3
Permanently enable all onboard SCSI termination. OPEN (default)
Ta b l e 8 - 3 . J 9 I 2 C I n t e r f a c e C o n n e c t o r
P i n o u t
Pin Description
1 SDA
2 GND
3 SCL
4 VCC
Ta b l e 8 - 4 . J 5 S e r i a l P o r t P i n o u t
Pin Description
1 RXD
2 TXD
3 GND
Ta b l e 8 - 2 . J 1 Te r m i n a t i o n E n a b l e S e t t i n g s (continued)
Type of SCSI Termination J10 Setting