ST STM32F446 Series Reference Manual page 1134

USB on-the-go full-speed/high-speed (OTG_FS/OTG_HS)
Device mode:
31 30 29
Res. Res. Res. Res.
15 14 13
DPID[0]
r r r
Bits 31:28 Reserved, must be kept at reset value.
Bit 27 STSPHST: Status phase start
Bits 26:25 Reserved, must be kept at reset value.
Bits 24:21 FRMNUM[3:0]: Frame number
Bits 20:17 PKTSTS[3:0]: Packet status
Bits 16:15 DPID[1:0]: Data PID
Bits 14:4 BCNT[10:0]: Byte count
Bits 3:0 EPNUM[3:0]: Endpoint number
1134/1328
28 27 26 25
STSPH
Res. Res.
ST
r
12 11 10 9
BCNT[10:0]
r r r r
Indicates the start of the status phase for a control write transfer. This bit is set along with
the OUT transfer completed PKTSTS pattern.
This is the least significant 4 bits of the frame number in which the packet is received on the
USB. This field is supported only when isochronous OUT endpoints are supported.
Indicates the status of the received packet
0001: Global OUT NAK (triggers an interrupt)
0010: OUT data packet received
0011: OUT transfer completed (triggers an interrupt)
0100: SETUP transaction completed (triggers an interrupt)
0110: SETUP data packet received
Others: Reserved
Indicates the data PID of the received OUT data packet
00: DATA0
10: DATA1
01: DATA2
11: MDATA
Indicates the byte count of the received data packet.
Indicates the endpoint number to which the current received packet belongs.
24 23 22
FRMNUM[3:0]
r r r
8 7 6
r r r
RM0390 Rev 4
21 20 19 18
PKTSTS[3:0]
r r r r
5 4 3 2
EPNUM[3:0]
r r r r
RM0390
17 16
DPID[1]
r r
1 0
r r