Complete USB2LPT 1.4 photo

Keywords: USB, LPT, parallel, parallel port, printer port, converter, adaptor

To USB2LPT — Overview

USB2LPT – Cloning instructions for Release 1.4

Meanwhile, the similar Release 1.7 exists.
For low-speed USB, Release 1.6 may suffice.

Electronic Components

Identical to Release 1.3. Except PCB (Printed Circuit Board), see below.

Inside device
Populated PCB

Software

Solder Jumper

SJ1Assignment of pin 25 of D-sub female connector
right connectedPin 25 to ground (default)
not connectedPin 25 unconnected
left connectedPin 25 to 5 Volt (or 3,3V if SJ4 is right-connected)

Instead feeding 5 V directly, a self-rearming fuse like Buy Reichelt PFRA040 is recommended

SJ2Deactivation of boot EEPROM
connectedEEPROM active (connected to microcontroller)
not connectedEEPROM disabled (disconnected from microcontroller), the microcontroller defaults to a Cypress USB device
SJ3Write-protection of boot EEPROM
right connectedEEPROM writeable
left connectedEEPROM write protected
SJ4Pullup voltage
left connected5 V Pullup (compatible to true parallel ports)
right connected3,3 V Pullup (recommended for non-5V-capable inputs, like Xilinx Spartan FPGAs)