Altera cyclone V Technical Reference page 2524

Hard processor system

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dieptsiz1 Fields

DMA Addressing.

Module Instance

Altera Corporation

for periodic IN endpoints, this field indicates the

number of packets that must be transmitted per

microframe on the USB. The core uses this field to

calculate the data PID for isochronous IN endpoints.

for non-periodic IN endpoints, this field is valid only

in Internal DMA mode. It specifies the number of

packets the core must fetchfor an IN endpoint before

it switches to the endpoint pointed to by the Next

Endpoint field of the Device Endpoint-n Control

Indicates the total number of USB packets that

constitute the Transfer Size amount of data for

endpoint 0.This field is decremented every time a

packet (maximum size or short packet) is read from

Indicates the transfer size in bytes for endpoint 0. The

core interrupts the application only after it has

exhausted the transfer size amount of data. The

transfer size can be Set to the maximum packet size of

the endpoint, to be interrupted at the end of each

packet. The core decrements this field every time a

packet from the external memory is written to the

Base Address

USB 2.0 OTG Controller

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