H8SSLASH2218 datasheet(525/750 Pages) RENESAS

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Section 14 Universal Serial Bus (USB)

Rev.6.00 Jun. 03, 2008 Page 477 of 698

REJ09B0074-0600

14.3.7

USB Endpoint Stall Register 1 (UESTL1)

UESTL1 is used to control stall cancellation mode for all endpoints.

Bit

Bit Name

Initial Value

R/W

Description

SCME

R/W

Reserved

The write value should always be 0.

6 to

—

All 0

Reserved

These bits are always read as 0 and cannot be

modified.

14.3.8

USB Endpoint Data Register 0s (UEDR0s)

UEDR0s stores the setup command for endpoint 0 (for Control_out transfer). UEDR0s stores 8-

byte command data sent from the host in setup stage.

For details on the USB operation when data for the next setup stage is received while data in

UEDR0s is being read, refer to section 14.8, Usage Notes.

UEDR0s is a byte register to which 4-byte address area is assigned. Accordingly, UEDR0s allows

the user to read 2-byte or 4-byte data continuously by word transfer or longword transfer.

Bit

Bit Name

Initial Value

R/W

Description

7 to 0 D7 to D0

—

These bits store the setup command for Control_out

transfer

14.3.9

USB Endpoint Data Register 0i (UEDR0i)

UEDR0i is a data register for endpoint 0 (for Control_in transfer). UEDR0i 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.

UEDR0i is a byte register to which 4-byte address area is assigned. Accordingly, UEDR0i allows

the user to write 2-byte or 4-byte data continuously by word transfer or longword transfer. For

details, see section 2.9.4, Accessing Registers Containing Write-Only Bits.

Bit

Bit Name

Initial Value

R/W

Description

7 to 0 D7 to D0

All 0

These bits store data for Control_in transfer

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