upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 286
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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
0
BKI1NK
Bit name
CHAPTER 12 USB FUNCTION CONTROLLER (USBF)
This bit controls NAK to Endpoint1 (bulk 1 transfer (IN)).
This bit is cleared to 0 only when the FIFO connected to the SIE side of the UF0BI1
register (64-byte FIFO of bank configuration) cannot receive data. It is set to 1 when a
toggle operation is performed (the data of the UF0BI1 register is retained until
transmission has been correctly completed). The bank is changed (toggle operation)
when the following conditions are satisfied.
This bit is automatically set to 1 and data transmission is started when the FIFO on the
CPU side becomes full and a FIFO toggle operation is performed as a result of writing
data to the FIFO. To send a short packet that does not make the FIFO on the CPU side
full, set the BKI1DED bit to 1 after completing writing data. When the BKI1DED bit is set
to 1, a toggle operation is performed and at the same time, this bit is automatically set to
1. This bit is also cleared to 0 as soon as the UF0BI1 register has been cleared.
1: Do not transmit NAK.
0: Transmit NAK (default value).
• Data is correctly written to the FIFO connected to the CPU bus side (writing has
• The value of the FIFO counter connected to the SIE side is 0.
been completed and the FIFO is full or the UF0DEND register is set).
Preliminary User’s Manual U19014EJ1V0UD
Function
(2/2)
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