HCTSIZ15

         Host Channel 15 Transfer Size Register

Module Instance	Base Address	Register Address
`i_usbotg_0_DWC_otg_intreg`	`0xFFB00000`	`0xFFB006F0`
`i_usbotg_1_DWC_otg_intreg`	`0xFFB40000`	`0xFFB406F0`

Size: 32

Offset: 0x6F0

Access: RW

Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.

Bit Fields
31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
`DoPng` `RW 0x0`	`Pid` `RW 0x0`		`PktCnt` `RW 0x0`										`XferSize` `RW 0x0`
15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
`XferSize` `RW 0x0`

HCTSIZ15 Fields

Bit

Name

Description

Access

Reset

DoPng

Do Ping (DoPng)
This bit is used only For OUT transfers.
Setting this field to 1 directs the host to do PING protocol.
Note: Do not Set this bit For IN transfers. If this bit is Set For
for IN transfers it disables the channel.

Value	Description
0x0	No ping protocol
0x1	Ping protocol

RW

0x0

30:29

Pid

PID (Pid)
The application programs this field with the type of PID to use For
the initial transaction. The host maintains this field For the rest of
the transfer.
 2'b00: DATA0
 2'b01: DATA2
 2'b10: DATA1
 2'b11: MDATA (non-control)/SETUP (control)

Value	Description
0x0	DATA0
0x1	DATA2
0x2	DATA1
0x3	MDATA (non-control)/SETUP (control)

RW

0x0

28:19

PktCnt

Packet Count (PktCnt)
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 Width of Packet
Counters

RW

0x0

18:0

XferSize

Transfer Size (XferSize)
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 Width of Transfer Size
Counters

RW

0x0