PDA, Tablet PC, MP3 players and other portable devices  > HP pinouts
Pin Name Dir Description
1 - - -
2 TXD OUT Transmit Data
3 RXD IN Receive Data
4 GND - Ground
4 pin HP48 calculator proprietary of HP48/HP95 calculator connector layout
4 pin HP48 calculator proprietary connector
at the calculator
According to 2 reports in our database (2 positive and 0 negative) this pinout should be correct.

Is this pinout
Source(s) of this and additional information: Hardware Book
This page contain parts under Copyright © 2000-2018 by pinouts.ru team.
No portion of this webpage may be reproduced in any form without providing visible HTML link to Old.Pinouts.ru . Webmaster permission required in any other cases.
Efforts have been made to ensure this page is correct, but it is the responsibility of the user to verify the data is correct for their application.