Usb Register Map; Table 177. Definition Of Allocated Buffer Memory; Table 178. Usb Register Map And Reset Values - ST STM32F101 series Reference Manual

Universal serial bus full-speed device interface (USB)
NUM_BLOCK[4:0]
23.5.4

USB register map

The table below provides the USB register map and reset values.
Offset Register
USB_EP0R
0x00
Reset value
USB_EP1R
0x04
Reset value
USB_EP2R
0x08
Reset value
USB_EP3R
0x0C
Reset value
643/1128

Table 177. Definition of allocated buffer memory

Value of
0 ('00000)
1 ('00001)
2 ('00010)
3 ('00011)
...
15 ('01111)
16 ('10000)
17 ('10001)
18 ('10010)
...
30 ('11110)
31 ('11111)

Table 178. USB register map and reset values

Reserved
Reserved
Reserved
Reserved
DocID13902 Rev 15
Memory allocated
when BL_SIZE=0
Not allowed
2 bytes
4 bytes
6 bytes
...
30 bytes
32 bytes
34 bytes
36 bytes
...
60 bytes
62 bytes
STAT_
RX
[1:0]
0 0 0 0 0
STAT_
RX
[1:0]
0 0 0 0 0
STAT_
RX
[1:0]
0 0 0 0 0
STAT_
RX
[1:0]
0 0 0 0 0
Memory allocated
when BL_SIZE=1
32 bytes
64 bytes
96 bytes
128 bytes
...
512 bytes
N/A
N/A
N/A
...
N/A
N/A
EP STAT_
TYPE TX
[1:0] [1:0]
0 0 0 0 0 0 0 0
EP STAT_
TYPE TX
[1:0] [1:0]
0 0 0 0 0 0 0 0
EP STAT_
TYPE TX
[1:0] [1:0]
0 0 0 0 0 0 0 0
EP STAT_
TYPE TX
[1:0] [1:0]
0 0 0 0 0 0 0 0
RM0008
EA[3:0]
0 0 0
EA[3:0]
0 0 0
EA[3:0]
0 0 0
EA[3:0]
0 0 0