GRXSTSR

         Receive Status Debug Read Register

Module Instance	Base Address	Register Address
`i_usbotg_0_DWC_otg_intreg`	`0xFFB00000`	`0xFFB0001C`
`i_usbotg_1_DWC_otg_intreg`	`0xFFB40000`	`0xFFB4001C`

Size: 32

Offset: 0x1C

Access: RO

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
`Reserved`	`RESERVED` `RO 0x0`						`FN` `RO 0x0`				`PktSts` `RO 0x0`				`DPID` `RO 0x0`
15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
`DPID` `RO 0x0`	`BCnt` `RO 0x0`											`ChNum` `RO 0x0`

GRXSTSR Fields

Bit

Name

Description

Access

Reset

30:25

RESERVED

RESERVED

RO

0x0

24:21

FN

Mode: Device only
Frame Number (FN)
This is the least significant 4 bits of the (micro)Frame number in
which the packet is received on the USB. This field is supported
only when isochronous OUT endpoints are supported.

RO

0x0

20:17

PktSts


Mode: Host only
Packet Status (PktSts)
Indicates the status of the received packet
 4'b0010: IN data packet received
 4'b0011: IN transfer completed (triggers an interrupt)
 4'b0101: Data toggle error (triggers an interrupt)
 4'b0111: Channel halted (triggers an interrupt)
 Others: Reserved
 
 Mode: Device only
 Packet Status (PktSts)
Indicates the status of the received packet
 4'b0001: Global OUT NAK (triggers an interrupt)
 4'b0010: OUT data packet received
 4'b0011: OUT transfer completed (triggers an interrupt)
 4'b0100: SETUP transaction completed (triggers an
interrupt)
 4'b0110: SETUP data packet received
 Others: Reserved

Value	Description
0x1	Global OUT NAK in DEVICE mode (triggers an interrupt)
0x2	IN data packet received in HOST mode and OUT data packet received in DEVICE mode
0x3	IN or OUT transfer completed in both HOST and DEVICE mode (triggers an interrupt)
0x4	SETUP transaction completed in DEVICE mode (triggers an interrupt)
0x5	Data toggle error (triggers an interrupt) in HOST mode
0x6	SETUP data packet received in DEVICE mode
0x7	Channel halted in HOST mode (triggers an interrupt)

RO

0x0

16:15

DPID


Mode: Host only
Data PID (DPID)
Indicates the Data PID of the received packet
 2'b00: DATA0
 2'b10: DATA1
 2'b01: DATA2
 2'b11: MDATA
 
Mode: Device only
Data PID (DPID)
Indicates the Data PID of the received OUT data packet
 2'b00: DATA0
 2'b10: DATA1
 2'b01: DATA2
 2'b11: MDATA

Value	Description
0x0	DATA0
0x1	DATA2
0x2	DATA1
0x3	MDATA

RO

0x0

14:4

BCnt


Mode: Host only
Byte Count (BCnt)
Indicates the byte count of the received IN data packet.

Mode: Device only
Byte Count (BCnt)
Indicates the byte count of the received data packet.

RO

0x0

3:0

ChNum


Mode: Host only
Channel Number (ChNum)
Indicates the channel number to which the current received
packet belongs.

Mode: Device only
Endpoint Number (EPNum)
Indicates the endpoint number to which the current received
packet belongs.

RO

0x0