upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 311
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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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(26) UF0 FIFO clear 0 register (UF0FIC0)
UF0FIC0
Bit position
This register clears each FIFO.
This register is write-only, in 8-bit units. If this register is read, 00H is read.
FW can clear the target FIFO by writing 1 to the corresponding bit of this register. The bit to which 1 has been
written is automatically cleared to 0. Writing 0 to the bit is invalid.
The related bits are invalid if each endpoint is not supported by the setting of the UF0E1IM register and the
current setting of the interface.
5
4
1
0
7
0
BKI1SC
BKI1CC
EP0WC
EP0RC
Bit name
6
0
CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
BKI1SC
This bit clears only the FIFO on the SIE side of the UF0BI1 register (reset the counter).
Writing this bit is invalid while an IN token for Endpoint 1 is being processed with the
BKI1NK bit set to 1.
The BKI1NK bit is automatically cleared to 0 by clearing the FIFO. Make sure that the
FIFO on the CPU side is empty when this bit is used.
This bit clears only the FIFO on the CPU side of the UF0BI1 register (reset the counter).
This bit clears the UF0E0W register (resets the counter).
Writing to this bit is invalid while an IN token for Endpoint 0 is being processed with the
EP0NKW bit set to 1.
The EP0NKW bit is automatically cleared to 0 by clearing the FIFO.
This bit clears the UF0E0R register (resets the counter).
When the EP0NKR bit is set to 1 (except when it has been set by FW), the EP0NKR bit
is automatically cleared to 0 by clearing the FIFO.
5
1: Clear
1: Clear
1: Clear
1: Clear
Preliminary User’s Manual U19014EJ1V0UD
BKI1CC
4
3
0
2
0
Function
EP0WC
1
EP0RC
0
Address
FF79H
After reset
00H
311
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