RE: [AVR-Chat] USB 2.0 hi-speed -> parallel interface
2005-08-08 by Paul Curtis
What about the FT2232 chip that has JTAG-like output? Not used it myself, but it looks sort of OK for what you're doing. However, 100MHz TCK is very optimistic for a software-only solution or even a hardware solution using the FT2232. You might want to look at the Cypress devices that have a programmable engine that can act as a USB to IDE bridge, for instance, and some even have DMA... -- Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk <http://www.rowley.co.uk/> CrossWorks for MSP430, ARM, AVR and now MAXQ processors _____
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From: Qboll [mailto:msg_qboll@hotmail.com] Sent: 08 August 2005 19:05 To: AVR-Chat@yahoogroups.com Subject: [AVR-Chat] USB 2.0 hi-speed -> parallel interface Hi All, I also found chips on the internet and played with the FTDI245 chips.(works perfect.) But the FTDI and Chip45 are USB2.0 full-speed devices.(max 12Mbps) I was looking at USB2.0 hi-speed devices. (max 480Mbps) I need the speed to make a JTAG programmer/ Boundry scan controller. I needed speed that is around 100Mbps.(TCK) It's possible to make this with slower speeds devices but I want to design this as fast and best possible. So for my application I don't realy need an AVR device. I can use the Data lines from USB device for controlling the JTAG lines. Ofcourse make a safety circuit so I don't blow up the USB device when connected to a external JTAG device. Does anyone know if these kind of chips are available? (same kind of interface as the FTDI245 chips) Thanks, Greetings, Pascal _____ YAHOO! GROUPS LINKS * Visit your group " AVR-Chat <http://groups.yahoo.com/group/AVR-Chat> " on the web. * To unsubscribe from this group, send an email to: AVR-Chat-unsubscribe@yahoogroups.com <mailto:AVR-Chat-unsubscribe@yahoogroups.com?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> . _____