Cypress EZ-USB FX3 User Manual

EZ-USB FX3 Technical Reference Manual, Document Number: 001-76074 Rev. *F 419
EEPM_CS
0xE0031C00
10.13.1 EEPM_CS (continued)
16 URUN_REPAIR_EN This bit will repair the EPM whenever there is under run due to SYSTEM EPM will keep on reading
the packet from SYSMEM whenever data is ready from SYSMEM. If an underrun occurs, EPM will
raise the UIB_INTR.EPM_URUN interrupt.
15:0 VALID_PACKETS Bit vector indicating which of the 16 retry buffer contain a valid packet.
In SuperSpeed mode, this buffer functions as a circular buffer trailing packets that can be retried
behind the WRITE_PTR. In High-Speed mode, each End Point has 1 retry buffer that may inde-
pendently valid or invalid.
These bits are cleared when the Protocol Layer 'activates' an End Point (as opposed to 'reactivating'
it). In SuperSpeed mode all bits are cleared at once, in High-Speed mode only the bit for the Endpoint
being activated is cleared.

Cypress EZ-USB FX3 Specifications

General

Brand	Cypress
Model	EZ-USB FX3
Category	Controller
Language	English