Tue 24 Oct 2006
My new found love for Cypress Semiconductor has led me to look at their other offerings besides the PSoC platform. The development kit was around 100USD with the software, USB programmer, LCD, and a few other toys. There are also a few that are as cheap as 30USD. Everything worked out of the box and I was able to test the first code on the PSoC only minutes after installing the software. Furthermore, Cypress is pretty good about sending samples, albeit in oversized boxes, so testing their design is pretty painless. For these reasons, I am going to try to implement a Cypress, low-speed USB device.
The basis for this design will be the CY7C638xx line of chips, which can be directly connected to the USB port and will even provide regulated 3.3V power to peripheral hardware. These chips also come in PDIP form factor which is good for prototyping. Once the samples arrive, I will try to make something based on the CY4623 USB optical mouse reference, something that will seamlessly fit in with the HID driver and will provide an input device to the computer. Maybe one day, interface it with an msp430 and track mu rhythm to move a pointer, all with a tiny USB device. For now, here is some documentation.
( cy7c638xx_8.pdf ) ( cy4623_mouse_reference_design_19.zip )
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