RM0033 Rev 9 1143/1381
RM0033 USB on-the-go high-speed (OTG_HS)
1260
Peripheral mode:
OTG_HS Receive FIFO size register (OTG_HS_GRXFSIZ)
Address offset: 0x024
Reset value: 0x0000 0400
The application can program the RAM size that must be allocated to the RxFIFO.
313029282726252423222120191817161514131211109876543210
Reserved
FRMNUM PKTSTS DPID BCNT EPNUM
rrr r r
Bits 31:25 Reserved, must be kept at reset value.
Bits 24:21 FRMNUM: Frame number
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.
Bits 20:17 PKTSTS: Packet status
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
Bits 16:15 DPID: Data PID
Indicates the Data PID of the received OUT data packet
00: DATA0
10: DATA1
01: DATA2
11: MDATA
Bits 14:4 BCNT: Byte count
Indicates the byte count of the received data packet.
Bits 3:0 EPNUM: Endpoint number
Indicates the endpoint number to which the current received packet belongs.
313029282726252423222120191817161514131211109876543210
Reserved
RXFD
rw
Bits 31:16 Reserved, must be kept at reset value.
Bits 15:0 RXFD: RxFIFO depth
This value is in terms of 32-bit words.
Minimum value is 16
Maximum value is 1024
The power-on reset value of this register is specified as the largest Rx data FIFO depth.
To Next Page
Loading...
Need help?
General
