r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 954
r4f2456
Manufacturer Part Number
r4f2456
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2456.pdf
(1376 pages)
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Section 16 USB Function Module (USB)
16.3.11 EP0o Data Register (EPDR0o)
EPDR0o is a 16-byte receive FIFO buffer for endpoint 0. EPDR0o holds endpoint 0 receive data
other than setup commands. When data is received successfully, EP0o TS in interrupt flag register
1 is set, and the number of receive bytes is indicated in the EP0o receive data size register. After
the data has been read, setting EP0o RDFN in trigger register 0 enables the next packet to be
received. This FIFO buffer can be initialized by means of EP0o CLR in FCLR register 0.
16.3.12 EP0s Data Register (EPDR0s)
EPDR0s is an 8-byte FIFO buffer specifically for receiving endpoint 0 setup commands. Only the
setup command to be processed by the application is received. When command data is received
successfully, the SETUPTS bit in interrupt flag register 1 is set.
As a latest setup command must be received in high priority, if data is left in this buffer, it will be
overwritten with new data. If reception of the next command is started while the current command
is being read, command reception has priority, the read by the application is forcibly stopped, and
the read data is invalid.
Rev. 1.00 Sep. 19, 2008 Page 924 of 1342
REJ09B0467-0100
Bit
7 to 0
Bit
7 to 0
Bit Name
D7 to D0
Bit Name
D7 to D0
Initial
Value
All 0
Initial
Value
All 0
R/W
R
R/W
R
Description
Data register for control-out transfer
Description
Data register for storing the setup command at the
control-out transfer
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