upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 297
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upd78f0730
Manufacturer Part Number
upd78f0730
Description
8-bit Single-chip Microcontroller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD78F0730.pdf
(518 pages)
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Bit position
2
1
0
STG
PROT
CPUDEC
Bit name
CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
This bit is set to 1 when the stage of control transfer has changed to the status stage. It
is valid for both FW-processed and hardware-processed requests. This bit is also set to
1 when the stage of control transfer (without data) has changed to the status stage.
This bit is automatically cleared to 0 by hardware when the next SETUP token is
received.
It is also set to 1 when the stage of control transfer has changed to the status stage
while ACK cannot be correctly received in the data stage. In this case, the EP0NKW bit
of the UF0E0N register is also cleared to 0 as soon as the UF0E0W register has been
cleared, if the FW is processing control transfer (read).
This bit indicates that a SETUP token has been received. It is valid for both FW-
processed and hardware-processed requests.
This bit is set to 1 when data has been correctly received in the UF0E0ST register.
Clear this bit to 0 by FW when the first read access is made to the UF0E0ST register. If
it is not cleared to 0 by FW, reception of the next SETUP token cannot be correctly
recognized.
This bit is used to accurately recognize that a SETUP transaction has been executed
again during control transfer. If the SETUP transaction is re-executed during control
transfer and if a second request is executed by hardware, the CPUDEC bit is not set to
1, but the PROT bit can be used for recognition of the re-execution.
This bit indicates that the UF0E0ST register has a request that is to be decoded by FW.
This bit is automatically cleared to 0 by hardware when all the data of the UF0E0ST
register is read.
1: Status stage (interrupt request is generated)
0: Not status stage (default value)
1: SETUP token is correctly received (interrupt request is generated).
0: SETUP token is not received (default value).
1: Data is in UF0E0ST register (interrupt request is generated).
0: Data is not in UF0E0ST register (default value).
Preliminary User’s Manual U19014EJ1V0UD
Function
(2/2)
297
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