Cypress FX2 USB interface chip (usb 2.0 high speed) actually has an embedded 8051 core in it. They did finally upgrade it (to arm9, sigh) for their USB3 variant

Cypress FX2 USB interface chip (usb 2.0 high speed) actually has an embedded 8051 core in it. They did finally upgrade it (to arm9, sigh) for their USB3 variant of the chip.