hctsiz15

Module Instance	Base Address	Register Address
`usb0`	`0xFFB00000`	`0xFFB006F0`
`usb1`	`0xFFB40000`	`0xFFB406F0`

Offset: 0x6F0

Access: RW

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

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.

Value	Description
0x0	No ping protocol
0x1	Ping protocol

RW

0x0

30:29

pid

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.

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

RW

0x0

28:19

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 10 bits.

RW

0x0

18:0

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 19 bits.

RW

0x0