HP iPAQ 31/36/3700 connector

12 pin iPAQ MALE special connector pin-out & layout

12 pin iPAQ MALE special connector  at the PDA or cable

1V_ADPAC adapter power in +
2V_ADPAC adapter power in +
3DTR RS232Data Terminal Ready
5CTS RS232Clear To Send
6RTS RS232Request To Send
7TXD RS232Transmit Data, GPS R
8RXD RS232Receive Data, GPS T
9DCD RS232Data Carry Detect
11USB - UDC +USB positive data signal
12USB - UDC -USB negative data signal

HP iPaq 22 pin connector

HP Jornada 5xx