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HP iPAQ 19/22/39/3800/54/5500

pinout

There is no com port connected (pins 6-9 and 11-14) in h1910.
PinSignalDescription
1V_ADP 
2V_ADP 
3V_ADP 
4V_ADP 
5Reserved – Do Not Use 
6DCD RS232 
7RXD RS232<--, GPS T
8TXD RS232-->, GPS R
9DTR RS232 
10GNDGPS -
11DSR RS232 
12RTS RS232 
13CTS RS232 
14RI RS232 
15GND 
16No Connect – Do Not Use 
17USB Detect 
18No Connect – Do Not Use 
19USB – UDC + 
20No Connect – Do Not Use 
21USB – UDC - 
22GND 

Source:www.pinouts.ru