Can the Win-I2CUSB/DLL support byte-level commands that are available in Win-I2CNT/DLL (parallel-port) version?
No, the USB version does not support the byte level commands that are available in Win-I2CNT. The Win-I2CUSB adapter uses microcontroller hardware to generate I2C signalling, making byte-level commands difficult, and the USB protocol would insert millisecond delays between bytes. The parallel adapter (Win-I2CNT) generates I2C signalling directly using software toggling the hardware-port pins. Q: How do I determine the Serial Number of my USB-to-I2C hardware adapter: A: The s/n sticker is located on the socketed (PLCC) controller IC. If the sticker is missing, the s/n can be read from the software main menu “Options”. The adapter must be connected to the PC USB port and detected by the software to read the s/n.