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MPC2F35E2 데이터시트(PDF) 29 Page - Megawin Technology Co., Ltd

부품명 MPC2F35E2
상세설명  Low-speed USB micro-controller
PDF  46 Pages
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제조업체  MEGAWIN [Megawin Technology Co., Ltd]
홈페이지  http://www.megawin.com.tw/megawin_EN/Index.asp
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MPC2F35E2 데이터시트(HTML) 29 Page - Megawin Technology Co., Ltd

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MEGAWIN
MPC2F35_USB Data Sheet
29
RXSTAT: Endpoint Receive Status Register (Endpoint-Indexed)
Read/Write
Address: 22H
Default: 0000_0XXX
System Reset or USB Reset
Bit
Number
Bit
Mnemonic
Function
7
RXSEQ
Receive Endpoint Sequence Bit (read, conditional write):
The bit will be toggled on completion of an ACK handshake in response to
an OUT token. This bit can be written by firmware if the RXOVW bit is set
when written along with the new RXSEQ value.
6
RXSETUP
Received Setup Transaction:
This bit is set by hardware when a valid SETUP transaction has been
received. Clear this bit upon detection of a SETUP transaction or the
firmware ready to handle the data/status stage of control transfer.
5
STOVW
Start Overwrite Flag (read-only):
Set by hardware upon receipt of a SETUP token for any control endpoint to
indicate that the receive FIFO is being overwritten with new SETUP data.
This bit is used only for control endpoints.
4
EDOVW
End Overwrite Flag:
This flag is set by hardware during the handshake phase of a SETUP
stage. This bit is cleared by firmware to read FIFO data. This bit is only
used for control endpoints.
3
RXSOVW
Receive Data Sequence Overwrite Bit:
Write ‘1’ to this bit to allow the value of the RXSEQ bit to be overwritten.
Writing a ‘0’ to this bit, it has no effect on RXSEQ. This bit always returns to
‘0’ when read.
2
-
Reserved:
Write zero to this bit.
1
-
Reserved:
Write zero to this bit.
0
-
Reserved:
Write zero to this bit.



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