ST STM32F446 Series

USB on-the-go full-speed/high-speed (OTG_FS/OTG_HS) RM0390
1180/1328 RM0390 Rev 4
31.15.51 OTG device IN endpoint x DMA address register (OTG_DIEPDMAx)
(x = 0..8, where x = endpoint number)
Address offset: 0x914 + (x * 0x20)
Reset value: 0x0000 0000
Note: Configuration register applies only to USB OTG HS
31.15.52 OTG device IN endpoint transmit FIFO status register
(OTG_DTXFSTSx) (x = 0..5[FS] /8[HS], where
x = endpoint number)
Address offset for IN endpoints: 0x918 + (x * 0x20) This read-only register contains the free
space information for the device IN endpoint Tx FIFO.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
DMAADDR[31:16]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
1514131211109876543210
DMAADDR[15:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:0 DMAADDR[31:0]: DMA Address
This field holds the start address in the external memory from which the data for the
endpoint must be fetched. This register is incremented on every AHB transaction.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
INEPTFSAV[15:0]
rrrrrrrrrrrrrrrr
31:16 Reserved, must be kept at reset value.
15:0 INEPTFSAV[15:0]: IN endpoint Tx FIFO space available
Indicates the amount of free space available in the endpoint Tx FIFO.
Values are in terms of 32-bit words:
0x0: Endpoint Tx FIFO is full
0x1: 1 word available
0x2: 2 words available
0xn: n words available
Others: Reserved