mpc235 Megawin Technology, mpc235 Datasheet - Page 30

• Manufacturer Part Number: mpc235
• Description: Low-speed Usb Micro-controller
• Manufacturer: Megawin Technology

RXSTAT: Endpoint Receive Status Register (Endpoint-Indexed)
Read/Write
Default: 0000_0XXX
Number
30
Bit
7
6
5
4
3
2
1
0
Mnemonic
RXSETUP
RXSOVW
EDOVW
STOVW
RXSEQ
Bit
-
-
-
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.
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.
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.
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.
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 has no effect on RXSEQ. This bit always returns ‘0’
when read.
Reserved:
Write zero to this bit.
Reserved:
Write zero to this bit.
Reserved:
Write zero to this bit.
MPC235 Technical Summary
Function
Address: 22H
System Reset or USB Reset
MEGAWIN