r5s77631ay266bgv Renesas Electronics Corporation., r5s77631ay266bgv Datasheet - Page 1593

Manufacturer Part Number

r5s77631ay266bgv

Renesas 32-bit Risc Microcomputer Superhtm Risc Engine Family Sh-4a Series

Manufacturer

Renesas Electronics Corporation.

36.3.18 EP0s Data Register (EPDR0s)

EPDR0s is a data register specifically for endpoint 0 setup command. EPDR0s holds 8-byte

command data sent in the setup stage. However, only the command to be processed by a

microprocessor (firmware) is received. The command data to be processed automatically by this

module is not stored.

Since the setup command mast be received, previous data in the buffer is over written with new

data. In other words, when the reception of data in the setup stage starts during read, reception has

priority and read data is invalid.

Note: The EPDR0s register should be read in longword units or eight consecutive times in byte

Initial value:

units. If reading is stopped before it completes, data received in the subsequent setup stage

is not read successfully.

Initial Value R/W Description

These bits are always read as undefined value.

Data register for storing the setup command at the

control-out transfer

Section 36 USB Function Controller (USBF)

Rev. 1.00 Oct. 01, 2007 Page 1527 of 1956

REJ09B0256-0100