USB Core to 8051 interaction | Cypress Semiconductor
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USB Core to 8051 interaction
Last Updated: December 31, 2011
Is a NAK issued by a host for a Bulk In packet reported by the USB core to the 8051 in AN21xx EZ-USB or CY7C646xx EZ-USB FX.
If the Host NAKs a Bulk In packet, the NAK occurred is not reported by the USB Core to the 8051.