H8S15 Datasheet, PDF (570/904 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

Section 15 Universal Serial Bus Interface (USB)
H8S/2215 Group
15.3.18 USB Endpoint Data Register 3o (UEDR3o)
UEDR3o is a data register for endpoint 3o (for Isochronous_out transfer). UEDR3o stores data
received from the host. The number of data items to be read must be specified by UESZ3o.
When 1 byte is read from UEDR3o, UESZ3o is decremented by 1.
All data items must be read before the next SOF packet is received.
UEDR3o is a byte register to which 4-byte address area is assigned. Accordingly, UEDR3o allows
the user to read 2-byte or 4-byte data by word transfer or longword transfer.
Bit Bit Name
7 to 0 D7 to D0
Initial Value R/W
—
R
Description
These bits store data for Isochronous_out transfer
15.3.19 USB Endpoint Data Register 4i (UEDR4i)
UEDR4i is a data register for endpoint 4i (for Bulk_in transfer). UEDR4i stores data to be sent to
the host. The number of data items to be written continuously must be the maximum packet size or
less.
UEDR4i is a byte register to which 4-byte address area is assigned. Accordingly, UEDR4i allows
the user to write 2-byte or 4-byte data by word transfer or longword transfer. For information on
accessing this register, see 2.9.4, Accessing Registers Containing Write-Only Bits.
Bit Bit Name
7 to 0 D7 to D0
Initial Value R/W
All 0
W
Description
These bits store data for Bulk_in transfer
15.3.20 USB Endpoint Data Register 4o (UEDR4o)
UEDR4o is a data register for endpoint 4o (for Bulk_out transfer). UEDR4o stores data received
from the host. The number of data items to be read must be specified by UESZ4o.
When 1 byte is read from UEDR4o, UESZ4o is decremented by 1.
UEDR4o is a byte register to which 4-byte address area is assigned. Accordingly, UEDR4o allows
the user to read 2-byte or 4-byte data by word transfer or longword transfer.
Bit Bit Name
7 to 0 D7 to D0
Initial Value R/W
—
R
Description
These bits store data for Bulk_out transfer
Page 516 of 846
REJ09B0140-0900 Rev. 9.00
Sep 16, 2010