Can someone tell me, from where can I download the header files for the Cypress CY7C64613 USB 8051 microcontroller. Cypress.com doesnt seem to have them and google couldnt help either. The files I need are ezusb.h and ezRegs.h Thanks in anticipation. I am using Keil C51 to compile. I downloaded the header file "REG7C646.H" from: http://www.keil.com/dd/chip/3133.htm but it doesnt seem to contain PORTnCFG's etc As I found from my googling, the files ezusb.h and ezRegs.h are the ones which'll get me going. But there is no reference as to where can i download them from.