MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 706
MCBSTM32EXL
Manufacturer Part Number
MCBSTM32EXL
Description
BOARD EVALUATION FOR STM32F103ZE
Manufacturer
Keil
Specifications of MCBSTM32EXL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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USB on-the-go full-speed (OTG_FS)
706/995
same time. If more than 8 transfer requests are pending from the application, the host
controller driver (HCD) must re-allocate channels when they become available from
previous duty, that is, after receiving the transfer completed and channel halted interrupts.
Each host channel can be configured to support in/out and any type of periodic/nonperiodic
transaction. Each host channel makes us of proper control (HCCHARx), transfer
configuration (HCTSIZx) and status/interrupt (HCINTx) registers with associated mask
(HCINTMSKx) registers.
Host channel control
●
Host channel transfer
The host channel transfer size registers (HCTSIZx) allow the application to program the
transfer size parameters, and read the transfer status. Programming must be done before
setting the channel enable bit in the host channel characteristics register. Once the endpoint
is enabled the packet count field is read-only as the OTG FS core updates it according to the
current transfer status.
●
Host channel status/interrupt
The host channel-x interrupt register (HCINTx) indicates the status of an endpoint with
respect to USB- and AHB-related events. The application must read these register when the
host channels interrupt bit in the core interrupt register (HCINT bit in OTG_FS_GINTSTS) is
set. Before the application can read these registers, it must first read the host all channels
interrupt (HCAINT) register to get the exact channel number for the host channel-x interrupt
register. The application must clear the appropriate bit in this register to clear the
The following host channel controls are available to the application through the host
channel-x characteristics register (HCCHARx):
–
–
–
–
–
–
–
–
The following transfer parameters can be programmed:
–
–
–
channel enable/disable
program the FS/LS speed of target USB peripheral
program the address of target USB peripheral
program the endpoint number of target USB peripheral
program the transfer IN/OUT direction
program the USB transfer type (control, bulk, interrupt, isochronous)
program the maximum packet size (MPS)
program the periodic transfer to be executed during odd/even frames
transfer size in bytes
number of packets constituting the overall transfer size
initial data PID
Doc ID 13902 Rev 9
RM0008
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