Serial Port Secrets: "Jornada 5xx Serial Info


When the 'new' of the Jornada finally worn off... I attacked two of the Jornada's $30 serial cables to reduce their 'carry weight' with the following findings that may be of interest to other techies.

Connector pins are as follows (note, colors should, but may not match) The Jornada connector had no visible number or start markings, so the Jornada pin numbers below are looking into the unit (female) opening with the Jornada face up and counting from left to right.

There is one tiny clue that can provide valuable information for both the serial and power connector. The Jornada internal connections are gold plated traces directly on the Jornada motherboard, and using a good light and magnifier, you can see that one connector on the serial side and one on the power connector is a fraction of a millimeter longer than the others. These two connections are signal ground and power minus on the theory that these pins will connect first and provide a ground safety.

The Jornada pins 1-4 are USB and most, but not all, of the remainder for serial with pin 4 being used by both serial and USB (The only visible marks on the connector and shell are 'DDK Thailand A')
Jornada 54x Serial Cable Pinouts
USB

Jorn
Conn

Wire
Color


1


2


3


4*

brn

Female
DB-9

Male
DB-9
1

8

red

4
2

9

blk

3
3

10

blue

2
4

11

wht

6
5

4*

brn

5






6

8

red

7

5

grn

8
8

6

yel

7
9

nc



9
??

7

??
??

12

??


nc

org



nc

pink


Anyone know what the Jornada pins 7 and 12 are? (Is one Carrier Detect?) "