Hi Members,

Thank you very much for your replies.

But most of the replies are very much diverted from the core issue of the thread. I said in the the first thread I am aware of FTDI modules and also aware of MCS-51 micros with on-chip USB feature but these things are not easily available everywhere.

I am looking at the feasiblity of bit-banged USB using a dedicated small[LPC] 8051 or some other family micro or a CPLD. These things are easily available in most of the parts of globe.

Andy Peters Said
First, you can't "big-bang" USB. Read up on it and you'll realize why.

Why not!! if a micro having sufficiently good MIPS or a CPLD or a FPGA is used 1.5M bits per second needed for USB is not a big thing. I have already given a link in my first post which describes the feasibility and implentation of a bit banged USB using AVR [12MHz].

My request to forum members is to please concentrate on the core issue.

Regards,
Prahlad Purohit