Altera cyclone V Technical Reference page 2337

Hard processor system

Hide thumbs Also See for cyclone V:

Table of Contents

hctsiz7 Fields

This register is used by the OTG host in the internal DMA mode to maintain the current buffer pointer for

IN/OUT transactions. The starting DMA address must be DWORD-aligned.

USB 2.0 OTG Controller

Send Feedback

This bit is used only for OUT transfers.Setting this

field to 1 directs the host to do PING protocol. Do not

Set this bit for IN transfers. If this bit is set for IN

transfers it disables the channel.

The application programs this field with the type of

PID to use forthe initial transaction. The host

maintains this field for the rest of the transfer.

This field is programmed by the application with the

expected number of packets to be transmitted (OUT)

or received (IN). The host decrements this count on

every successful transmission or reception of an

OUT/IN packet. Once this count reaches zero, the

application is interrupted to indicate normal

completion. The width of this counter is specified as

for an OUT, this field is the number of data bytes the

host sends during the transfer. for an IN, this field is

the buffer size that the application has Reserved for

the transfer. The application is expected to program

this field as an integer multiple of the maximum

packet size for IN transactions (periodic and non-

periodic).The width of this counter is specified as 19

No ping protocol

Ping protocol

MDATA (non-control)/SETUP (control)

Altera Corporation

Show Quick Links

Table of Contents