h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 633

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

18.3.11 USB Control /Status Register 0 (USBCSR0)
USBCSR0 controls the operation of the USB function core.
USBCSR0 is initialized to H'00 by a system reset or function software reset (see section 18.3.16,
USB Control Registers 0 and 1 (USBCR0, USBCR1)).
Bit
7 to 4 —
3
Bit Name Initial Value R/W
EP0STOP 0
All 0
R
R/W
Description
Reserved
These bits are always read as 0 and cannot be modified.
Endpoint 0 Stop
Used to protect the contents of endpoint 0 FIFO in the
USB function core. Setting this bit to 1 protects the data
that is sent to the EP0 OUT-FIFO by a SETUP
transaction.
0: Indicates that the EP0 OUT-FIFO and specific FIFO is
[Clearing conditions]
1: Indicates that the EP0 OUT-FIFO is in a read stop
[Setting conditions]
in an operating state.
state.
System reset
Function software reset
FVSR0O contents are not changed by reading
EPDR0O.
Indicates that the EP0 specific FIFO is in a write or
transfer stop state.
FIFO contents are not changed by writing to EPDR0I.
FVSR0I contents are not changed by setting EP0ITE.
Section 18 Universal Serial Bus Interface (USB)
Rev. 3.00 Jan 25, 2006 page 581 of 872
REJ09B0286-0300