ST STM32F412

USB on-the-go full-speed (OTG_FS) RM0402
1080/1163 RM0402 Rev 6
Figure 346. Bulk/control IN transactions
1. The grayed elements are not relevant in the context of this figure.
ai15675b
A
C
K
K
K
HostApplication AHB
O
U
T
T
T
D
A
T
A
0
M
P
S
1
M
PS
1
M
P
S
write
_
tx
_
fifo
(ch_1)
init_reg(ch_1)
set_ch_en
(ch_2)
init_reg(ch_2)
write_tx_
f
i
f
o
(
ch_1
)
set_ch_en
(ch_2)
ch_2
ch_2
c
h_
1
ch_1
D
e-a
ll
ocat
e
(
ch_1
)
ch_2
ch_2
ch_2
c
h_
1
A
C
K
K
K
O
U
T
T
T
RxFLvl interrupt
X
X
X
f
e
r
C
rr
o
m
p
l
i
n
t
e
r
r
u
r
r
p
t
set_ch_en
(ch_2)
Non-Periodic Request
Queue
Assume that this queue
can hold 4 entries.
4
1
6
ch 1
c
D
A
T
A
0
read_rx_sts
read_rx_fifo
1
MPS
set_ch_en
(ch_2)
RxFLvl interrupt
1
MPS
read_rx_stsre
ad_rx_fifo
RxFLvl interrupt
read_rx_sts
XferCompl interrupt
Disable
(ch_2)
1
2
3
4
5
6
7
De-allocate
(ch_2)
ChHltd interrupt
ch_2
2
3
5
7
8
9
12
13
read_rx_sts
RxFLvl interrupt
10
11
D
A
T
A
1
M
P
S
D
A
T
A
1
DeviceUSB
ACK
IN
ACK
IN