
Figure 3-3. PERC 4e/DC Controller Layout
Table 3-3.PERC4e/DCJumperandConnectorDescriptions
SCSI Termination Enable
Channel 1
Jumper pins 1-2 to enable software control of SCSI termination via drive detection.
Jumper pins 2-3 to disable onboard SCSI termination.
No jumper installed enables onboard SCSI termination. (See J17 and J18). This is the default.
SCSI Termination Enable
Channel 0
Socket that hold the memory module
Internal SCSI Channel 0
connector
Internal high-density SCSI bus connector. Connection is optional.
Internal SCSI Channel 1
connector
Internal high-density SCSI bus connector. Connection is optional.
External SCSI Channel 0
connector
External very-high density SCSI bus connector. Connection is optional.
Connector for an optional battery pack.
Pin-1 -BATT Terminal (black wire)
Pin-2Thermistor(whitewire)
Pin-3 +BATT Terminal (red wire)
To CLEAR the configuration data, install a jumper.
Connector is for diagnostic purposes.
Pin-1 RXD (Receive Data)
Pin-2 TXD (Transmit Data)
Pin-3 GND (Ground)
No jumper = Enabled (Default setting)
Jumpered = Disabled
TERMPWR Enable Channel 0
Jumper installed enables TERMPWR from the PCI bus. Default setting.
No jumper installed enables TERMPWR from the SCSI bus. (See J4 and J5)
TERMPWR Enable Channel 1
External SCSI Channel 1
connector
External very-high density SCSI bus connector. Connection is optional.
To CLEAR configuration data, install a jumper.
LEDs (located on back of card)
Indicate problems with the card.
Write Pending Indicator
(Dirty Cache LED)
Connector for enclosure LED to indicate when data in the cache has yet to be written to the
device. Optional.
No jumper = Enabled (Default setting)
Jumpered = Disabled
SCSI Termination Enable
Channel 0
Jumper pins 1-2 to enable software control of SCSI termination via drive detection.
Jumper pins 2-3 to disable onboard SCSI termination.
No jumper installed enables onboard SCSI termination. (See J17 and J18). This is the default.
SCSI Termination Enable
Channel 1
Connector is for diagnostic purposes.
Pin-1 RXD (Receive Data)
Pin-2 TXD (Transmit Data)
Pin-3 GND (Ground)
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