RM0390 Rev 4 1151/1328
RM0390 USB on-the-go full-speed/high-speed (OTG_FS/OTG_HS)
1264
31.15.25 OTG host channel x characteristics register (OTG_HCCHARx)
(x = 0..15[HS] / 11[FS], where x = Channel number)
Address offset: 0x500 + (x * 0x20)
Reset value: 0x0000 0000
Bit 2 PENA: Port enable
A port is enabled only by the core after a reset sequence, and is disabled by an overcurrent
condition, a disconnect condition, or by the application clearing this bit. The application
cannot set this bit by a register write. It can only clear it to disable the port. This bit does not
trigger any interrupt to the application.
0: Port disabled
1: Port enabled
Bit 1 PCDET: Port connect detected
The core sets this bit when a device connection is detected to trigger an interrupt to the
application using the host port interrupt bit in the core interrupt register (HPRTINT bit in
OTG_GINTSTS). The application must write a 1 to this bit to clear the interrupt.
Bit 0 PCSTS: Port connect status
0: No device is attached to the port
1: A device is attached to the port
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
CHENA CHDIS
ODD
FRM
DAD[6:0] MCNT[1:0] EPTYP[1:0] LSDEV Res.
rs rs rw rw rw rw rw rw rw rw rw rw rw rw rw
1514131211109876543210
EPDIR EPNUM[3:0] MPSIZ[10:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bit 31 CHENA: Channel enable
This field is set by the application and cleared by the OTG host.
0: Channel disabled
1: Channel enabled
Bit 30 CHDIS: Channel disable
The application sets this bit to stop transmitting/receiving data on a channel, even before
the transfer for that channel is complete. The application must wait for the Channel disabled
interrupt before treating the channel as disabled.
Bit 29 ODDFRM: Odd frame
This field is set (reset) by the application to indicate that the OTG host must perform a
transfer in an odd frame. This field is applicable for only periodic (isochronous and interrupt)
transactions.
0: Even frame
1: Odd frame
Bits 28:22 DAD[6:0]: Device address
This field selects the specific device serving as the data source or sink.
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