H8SX1663 datasheet(830/1158 Pages) RENESAS

830 / 1158 page

Section 16 USB Function Module (USB)

Rev.1.00 Jun. 07, 2006 Page 778 of 1102

REJ09B0294-0100

16.3.25

Endpoint Information Register (EPIR)

This register sets the information for each endpoint. Each endpoint needs five bytes to store the

information. Writing data should be done in sequence starting at logical endpoint 0. Do not write

data of more than 50 bytes (five bytes multiplied by ten endpoints) to this register. The

information should be written to this register only once at a power-on reset and no data should be

written after that. Description of writing data for one endpoint is shown below.

Although this register consists of one register to which data is written sequentially for one address,

the write data for the endpoint 0 is described as EPIR00 to EPIR05 (EPIR endpoint number in

write order) to make the explanation understood easier. Write should start at EPIR00.

Bit

Bit Name

Initial Value

R/W

Undefined

• EPIR00

Bit

Bit Name

Initial

Value

R/W

Description

7 to 4

D7 to D4

Undefined

Endpoint Number

[Enable setting range]

0 to 3

3, 2

D3, D2

Undefined

Endpoint Configuration Number

[Enable setting range]

0 or 1

1, 0

D1, D0

Undefined

Endpoint Interface Number

[Enable setting range]

0 to 3

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