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Verifone Tranz 330 Boondoggle

Documenting and messing with the Verifone Tranz 330 series credit card terminal

laenLaen
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Just hacking up and documenting the Verifone Tranz 330 credit card terminal.

This is a fun little device because it's divided into two boards. The "motherboard", which has a Z80 and a bunch of supporting chips and stuff, and the daughterboard, which has pretty much everything that interacts with the user: A piezo, keypad, VFD display, and magstripe reader. The two boards are connected with a 0.1" spaced header strip.

Verifone Tranz 330 card readers were pretty ubiquitous for many years, and now they're pretty easy to get inexpensively. I placed a bunch of $10 bids on eBay, and won almost every one of them.

  • Header block pinout

    Laen • 07/19/2016 at 20:56 • 0 comments

    Transcribing my notes from last time I hacked on one of these, here's the pinout for the daughterboard.

    1. Keypad, Row 1
    2. Keypad, Row 2
    3. Keypad, Row 3
    4. Keypad, Row 4
    5. Keypad, Column 4
    6. Keypad, Column 3
    7. Keypad, Column 2
    8. Keypad, Column 1
    9. ?
    10. ?
    11. ?
    12. Card Reader
    13. VFD Controller, Reset driver chip
    14. VFD Controller, Shift-in
    15. VFD Controller, Shift Clock
    16. +5V IN
    17. Piezo speaker
    18. ?
    19. ?
    20. GND

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