Step 5 Set Jumpers, Continued

J14 Serial Port J14 attaches to a serial cable. The pinout is:

Pin

Signal Description

Pin

Signal Description

1

Carrier Detect

2

Data Set Ready

3

Receive Data

4

Request to Send

5

Transmit Data

6

Clear to Send

7

Data Terminal Ready

8

Ring Indicator

9

Ground

10

CUT

J19 Onboard BIOS Enable J19 is a 2-pin berg which enables or disables MegaRAID onboard BIOS. The onboard BIOS should be enabled (J19 unjumpered) for normal board position.

 

J19 Setting

Onboard BIOS Status

 

 

Unjumpered

Enabled

 

 

Jumpered

Disabled

 

 

 

 

 

J17 Dirty Cache LED J17 is a two-pin connector for an LED mounted on the computer enclosure. The LED indicates when the data in the cache has yet to be written to the storage devices.

PinDescription

1High

2Dirty Cache Signal

J23 External Battery J23 is a 5-pin berg that attaches to the optional battery pack. The J23 pinout is:

Pin

Signal Description

1

+BATT Terminal (red wire)

2

Thermistor (white wire)

3

-BATT Terminal (black wire)

4

BATDQ (no wire)

5

Ground (no wire)

Cont'd

Chapter 6 Hardware Installation

55