MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 772
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)
772/995
31 30 29 28 27 26 25 24 23 22 21
Bits 31:21 Reserved
Bits 20:19 PKTCNT: Packet count
Bits 18:7 Reserved
Bits 6:0 XFRSIZ: Transfer size
OTG_FS device IN endpoint 0 transfer size register (OTG_FS_DIEPTSIZ0)
Address offset: 0x910
Reset value: 0x0000 0000
The application must modify this register before enabling endpoint 0. Once endpoint 0 is
enabled using the endpoint enable bit in the device control endpoint 0 control registers
(EPENA in OTG_FS_DIEPCTL0), the core modifies this register. The application can only
read this register once the core has cleared the Endpoint enable bit.
Nonzero endpoints use the registers for endpoints 1–15.
Reserved
Indicates the total number of USB packets that constitute the Transfer Size amount of data for
endpoint 0.
This field is decremented every time a packet (maximum size or short packet) is read from the
TxFIFO.
Indicates the transfer size in bytes for endpoint 0. The core interrupts the application only after
it has exhausted the transfer size amount of data. The transfer size can be set to the maximum
packet size of the endpoint, to be interrupted at the end of each packet.
The core decrements this field every time a packet from the external memory is written to the
TxFIFO.
PKTCNT
20
rw
19
rw
Doc ID 13902 Rev 9
18 17 16 15 14 13 12 11 10
Reserved
9
8
7
rw rw rw rw rw rw rw
6
5
4
XFRSIZ
3
2
RM0008
1
0
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