by E.Carta

Version 1.12

[Show the Text-Only version]

Warning: This is *NOT* a Hewlett-Packard official page. I assume no responsibility about any damage you could get by following these schematics.

0. Index.

• 0. Index
• 1. Introduction
• 2. Pinout assignment and pin description (read carefully!)
• 2.1 10pin connector (used on HP38 and HP49G calculators)
• 2.2 4pin connector (used on HP48 calculators)
• 2.3 DB9 connector (RS-232)
• 2.4 DB25 connector (RS-232)
• 3. Cables & Adapters
• 3.1 HP48/HP200LX-PC Cable (F1015-80002)
• 3.2. HP38-PC Cable (F1207B or 8120-6736)
• 3.3. HP49G-PC Cable (F1897-66000)
• 3.4. HP49G-HP49G Cable (F1633-66000)
• 3.5. 10pin[M]-to-4pin[F] adapter (5181-6643)
• 3.6. 10pin[M]-to-4pin[F] adapter (F1633-66001)
• 4. Related documents
• 5. Obtaining the last version of this document
• 6. Contacting the author of this document

1. Introduction.

These pages describe the pinout of some Hewlett-Packard graphic calculators, and the schematic of some cables and adapters. They can be useful, for example, to build a cable from yourself or to connect external devices to your calculator.

Be sure the cables you're using are the same used by me! You can find the part/no. on the bottom of the connector or on the cable itself. In case of doubt, check them with an ohmmeter. Also, be sure to read the pinout assignment before starting.

2. Pinout assignment and pin description.

Please read this section carefully.

Conventions used:

• The pinout is assigned, in male connectors, from left to right and from top to bottom. This convention is EIA/RS232 compliant.
• In female connectors, pinout assignment is mirrored (i.e., from right to left).
• I assume the calculator as a DTE, so RX means data TO calculator, while TX means data FROM calculator.
• Data from/to the PC are called DATA-OUT and DATA-IN, respectively.

2.1. 10pin connector (used on HP38 and HP49G calculators).

                               
                HP-10-M                             HP-10-F

          +-------/-\-------+                 +-------/-\-------+
          |  1  2  3  4  5  |                 |  5  4  3  2  1  |
          |  6  7  8  9 10  |                 | 10  9  8  7  6  |
          \-----------------/                 \-----------------/

 PINOUT DESCRIPTION:
  6. SHIELD
  7. TX (DATA FROM CALC)
  8. RX (DATA TO CALC)
  9. GND

2.2. 4pin Connector (used on HP48 calculators).

                               
                HP-4-M                             HP-4-F

            [ 1  2  3  4 ]                     [ 4  3  2  1 ]

 PINOUT DESCRIPTION:
  1. SHIELD
  2. TX (DATA FROM CALC)
  3. RX (DATA TO CALC)
  4. GND

2.3. DB9 Connector (RS-232).

                               
                 DB9-M                             DB9-F

          -------------------               -------------------
          \  1  2  3  4  5  /               \  5  4  3  2  1  /
           \   6  7  8  9  /                 \   9  8  7  6  /
            ---------------                   ---------------

 PINOUT DESCRIPTION:
  1. CD        6. DSR
  2. DATA-IN   7. RTS
  3. DATA-OUT  8. CTS
  4. DTR       9. RI
  5. GND

2.4. DB25 Connector (RS-232).

                               
                 DB25-M                              DB25-F

      ---------------------------          ---------------------------
      \  1  2  3 [..] 11 12 13  /          \  13 12 11 [..] 3  2  1  /
       \  14 15 [..] 23 24 25  /            \  25 24 23 [..] 15 14  /
        -----------------------              -----------------------

 PINOUT DESCRIPTION:
  2.  DATA-OUT   7. GND
  3.  DATA-IN    8. CD
  4.  RTS       20. DTR
  5.  CTS       22. RI
  6.  DSR

3. Cables & Adapters.

3.1. HP48/HP200LX-PC Cable (F1015-80002).

This was originally created to connect the HP-200LX with the PC, but then was sold with a 10pin-to-4 adapter (5181-6643) in order to use it as HP48 S- and G-series PC-Link.

Never (***NEVER***) use this cable on a HP38/HP49G.

   PINOUT ASSIGNMENT:
       HP-10-F           DB9-F
     SHIELD----------------SHIELD
       -  1----------------1  -
      TX  3--------------->2  DATA-IN
      RX  2<---------------3  DATA-OUT
       -  6----------------4  -
     GND  5----------------5  GND
       -  4----------------6  -
       -  8----------------7  -
       -  7----------------8  -
       -  9----------------9  -
  SHIELD 10----------------SHIELD

IMPORTANT: - means UNUSED; but all the wires are connected!!! You can easily convert this cable as a HP38/HP49G link. See section 4.

3.2. HP38-PC Cable (F1207B or 8120-6736).

This cable is the HP38 PC-Link. You can use it safely on a HP49G too.

    PINOUT ASSIGNMENT:
     HP-10-F           DB9-F
   SHIELD----------------SHIELD
 SHIELD 6----------------SHIELD
     TX 7--------------->2 DATA-IN
     RX 8<---------------3 DATA-OUT
    GND 9----------------5 GND

3.3. HP49G-PC Cable (F1897-66000).

This cable is the new HP49G PC-Link. You also get an adapter (F1633-66001) to use it with any HP48.

    PINOUT ASSIGNMENT:
     HP-10-F           DB9-F
   SHIELD----------------SHIELD
 SHIELD 6----------------SHIELD
     TX 7--------------->2 DATA-IN
     RX 8<---------------3 DATA-OUT
    GND 9----------------5 GND

3.4. HP49G-HP49G Cable (F1633-66000).

This is the cable hp gives you with the new HP49G. You also get an adapter (F1633-66001) to connect the HP49G with any HP48.

    PINOUT ASSIGNMENT:
     HP-10-F           HP-10-F
   SHIELD-----------------SHIELD
 SHIELD 6-----------------6 SHIELD
     TX 7---------------->8 RX
     RX 8<----------------7 TX
    GND 9-----------------9 GND

3.5. 10pin[M]-to-4pin[F] adapter (5181-6643).

This is the adapter hp gives you to use the HP200LX cable (F1015-80002) as HP48 PC-Link.

      PINOUT ASSIGNMENT:
       HP-10-M          HP-4-F
     SHIELD----------------SHIELD
  SHIELD 10----------------1 SHIELD
  DATA-IN 3<---------------2 TX
 DATA-OUT 2--------------->3 RX
      GND 5----------------4 GND

3.6. 10pin[M]-to-4pin[F] adapter (F1633-66001).

This is the adapter HP gives you to connect the HP49G with any HP48 using the HP49G-HP49G Cable (F1633-66000); it's also included in the HP49G PC-Link (F1897-66000) to use it with any HP48.

   PINOUT ASSIGNMENT:
    HP-10-M          HP-4-F
  SHIELD----------------SHIELD
SHIELD 6----------------1 SHIELD
    TX 7--------------->3 RX
    RX 8<---------------2 TX
   GND 9----------------4 GND

4. Related documents.

• Building the HP49G serial PC-Link cable: http://www.geocities.ws/hpcables/cable49g.htm
• Connecting a modem to your HP48 or HP49G calculator: http://www.geocities.ws/hpcables/hp2modem.htm
• The HP Cable Table by Joseph K. Horn: http://www.jps.net/joehorn/cable.htm
• The HP38, HP48 and HP49G FAQ: http://www.hpcalc.org

5. Obtaining the last version of this document.

Primary address for this page is: http://www.geocities.ws/hpcables/hpcables.htm

Secondary address: http://studenti.ing.unipi.it/~s172776/hpcables.htm

PK-zipped version: (6 Kb) http://www.geocities.ws/hpcables/hpcables.zip

Text-Only version: http://www.geocities.ws/hpcables/hpcables.txt

6. Contacting the author of this document.

Feel free to contact me for any problem or question.

My E-mail addresses are:

• [email protected]
• [email protected]