ST STM32L4x6 Reference Manual page 1550

USB on-the-go full-speed (OTG_FS)
Bits 5:4 PRBPER: Probe period
Bits 3:2 PRBDELTA: Probe delta
Bits 1:0 PRBDSCHG: Probe discharge
43.15.17 OTG Host periodic transmit FIFO size register
(OTG_HPTXFSIZ)
Address offset: 0x100
Reset value: 0x0200 0400
31 30 29
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15 14 13
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Bits 31:16 PTXFD: Host periodic Tx FIFO depth
This value is in terms of 32-bit words.
Minimum value is 16
Bits 15:0 PTXSA: Host periodic Tx FIFO start address
This field configures the memory start address for periodic transmit FIFO RAM.
1550/1693
These bits sets the T
ADPPRD
00: 0.625 to 0.925 sec (typical 0.775 sec)
01: 1.25 to 1.85 sec (typical 1.55 sec)
10: 1.9 to 2.6 sec (typical 2.275 sec)
11: Reserved
These bits set the resolution for RTIM value. The bits are defined in units of 32 kHz clock
cycles as follow:
00: 1 cycle
01: 2 cycles
10: 3 cycles
11: 4 cycles
For example if this value is chosen to be 01, it means that RTIM increments for every two
32 kHz clock cycles.
These bits set the times for T
00: 4 ms
01: 8 ms
10: 16 ms
11: 32 ms
28 27 26 25
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12 11 10 9
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as follow:
. These bits are defined as follow:
ADP_DSCHG
24 23 22
PTXFSIZ
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8 7 6
PTXSA
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DocID024597 Rev 3
21 20 19 18
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5 4 3 2
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RM0351
17 16
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1 0
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